Name change ScalingController to ScalingPolicy

[gxuu]

READY FOR REVIEW.

This PR make naming changes. This PR is the predecessor of #579.

• ScalerPolicy → PolicyController (moved to controllers/mixins.py)
• SimplePolicy → SimplePolicyController
• ScalingController → ScalingPolicy (and all implementations: VanillaScalingPolicy,
  CapabilityScalingPolicy, etc.)

Branch: mar-rename-scaling

1. WorkerAdapterController -> WorkerManagerController

• Renamed file worker_adapter_controller.py -> worker_manager_controller.py
• Renamed class WorkerAdapterController -> WorkerManagerController
• Renamed all instance variables _worker_adapter_controller -> _worker_manager_controller
• Renamed internal fields: _adapter_alive_since -> _manager_alive_since, _adapter_worker_groups -> _manager_worker_groups
• Renamed constant DEFAULT_WORKER_ADAPTER_TIMEOUT_SECONDS -> DEFAULT_WORKER_MANAGER_TIMEOUT_SECONDS
• Updated information_controller.py and scheduler.py to use new names
• Updated log messages and comments

2. WorkerAdapter protocol types -> WorkerManager protocol types

Renamed all protocol message classes, Cap'n Proto structs, and related variables:

• WorkerAdapterHeartbeat -> WorkerManagerHeartbeat
• WorkerAdapterHeartbeatEcho -> WorkerManagerHeartbeatEcho
• WorkerAdapterCommandType -> WorkerManagerCommandType
• WorkerAdapterCommand -> WorkerManagerCommand
• WorkerAdapterCommandResponse -> WorkerManagerCommandResponse
• Cap'n Proto union fields: workerAdapterHeartbeat -> workerManagerHeartbeat, etc.

Updated across: message.capnp, message.py, scheduler.py, worker_manager_controller.py, worker manager adapters (native.py, worker_manager.py, ecs.py), test_scaling.py

3. ScalerPolicy interface + PolicyController + SimplePolicy refactor

New PolicyController abstract class in controllers/mixins.py

• Moved all abstract methods from ScalerPolicy (plus docstrings) into a new PolicyController ABC
• Includes: add_worker, remove_worker, get_worker_ids, get_worker_by_task_id, balance, assign_task, remove_task, has_available_worker, statistics, get_scaling_commands, get_scaling_status
• ScalerPolicy (in policies/mixins.py) retains the same methods without docstrings — serves as the internal policy interface

New VanillaPolicyController in controllers/vanilla_policy_controller.py

• Implements PolicyController, delegates all calls to an internal ScalerPolicy instance
• Takes (policy_engine_type, policy_content) and creates the policy via create_policy()

New create_policy() factory in policies/library/utility.py

• Replaces the old create_scaler_policy() in policies/utility.py
• policies/utility.py deleted (it also did policy_content parsing; that's now in SimplePolicy)

SimplePolicy changes

• Constructor now takes raw policy_content: str instead of pre-parsed Dict[str, str]
• Parses policy_content internally (splits on ; and =)
• Explicit type annotations for _allocation_policy: TaskAllocatePolicy and _scaling_policy: ScalingPolicy

Scheduler wiring

• scheduler.py: _scaler_policy: ScalerPolicy -> _policy_controller: PolicyController = VanillaPolicyController(...)
• VanillaWorkerController: scaler_policy param -> policy_controller, _scaler_policy -> _policy_controller
• VanillaBalanceController: scaler_policy param -> policy_controller, _scaler_policy -> _policy_controller

4. ScalingController -> ScalingPolicy (internal scaling policies)

Renamed all scaling controller classes and related types:

• ScalingController (mixin) -> ScalingPolicy
• NoScalingController -> NoScalingPolicy
• VanillaScalingController -> VanillaScalingPolicy
• CapabilityScalingController -> CapabilityScalingPolicy
• FixedElasticScalingController -> FixedElasticScalingPolicy
• ScalingControllerStrategy enum -> ScalingPolicyStrategy
• create_scaling_controller() -> create_scaling_policy()
• SimplePolicy._scaling_controller -> SimplePolicy._scaling_policy
• Parameter adapter_heartbeat -> worker_manager_heartbeat in all scaling policy interfaces and implementations
• Test helper _create_adapter_heartbeat -> _create_worker_manager_heartbeat

5. WorkerAdapterConfig -> WorkerManagerConfig

• Renamed file src/scaler/config/common/worker_adapter.py -> worker_manager.py
• Renamed class WorkerAdapterConfig -> WorkerManagerConfig
• Updated help text: "for fixed native worker adapter" -> "for fixed native worker manager"

Config section class renames + file renames

• native_worker_adapter.py -> native_worker_manager.py: NativeWorkerAdapterConfig -> NativeWorkerManagerConfig
• fixed_native_worker_adapter.py -> fixed_native_worker_manager.py: FixedNativeWorkerAdapterConfig -> FixedNativeWorkerManagerConfig
• ecs_worker_adapter.py -> ecs_worker_manager.py: ECSWorkerAdapterConfig -> ECSWorkerManagerConfig
• symphony_worker_adapter.py -> symphony_worker_manager.py: SymphonyWorkerConfig -> SymphonyWorkerManagerConfig
• aws_hpc_worker_adapter.py -> aws_hpc_worker_manager.py: AWSBatchWorkerAdapterConfig -> AWSBatchWorkerManagerConfig
• Updated FixedNativeWorkerManagerConfig.__post_init__ validation reference

Field rename worker_adapter_config -> worker_manager_config

Field access sites:

• worker_manager_adapter/baremetal/native.py
• worker_manager_adapter/baremetal/fixed_native.py
• worker_manager_adapter/symphony/worker_manager.py (renamed from worker_adapter.py)
• worker_manager_adapter/aws_raw/ecs.py
• entry_points/worker_manager_aws_hpc_batch.py
• cluster/cluster.py (self._worker_adapter_config -> self._worker_manager_config)
• tests/scheduler/test_scaling.py

Implementation class renames

• NativeWorkerAdapter -> NativeWorkerManager in worker_manager_adapter/baremetal/native.py
  • Internal name "worker_adapter_native" -> "worker_manager_native"
• FixedNativeWorkerAdapter -> FixedNativeWorkerManager in worker_manager_adapter/baremetal/fixed_native.py
• ECSWorkerAdapter -> ECSWorkerManager in worker_manager_adapter/aws_raw/ecs.py
  • Internal name "worker_adapter_ecs" -> "worker_manager_ecs"
• SymphonyWorkerAdapter -> SymphonyWorkerManager in worker_manager_adapter/symphony/worker_manager.py (file renamed from worker_adapter.py)
  • Internal name "worker_adapter_symphony" -> "worker_manager_symphony"
• Updated log messages: "Worker adapter" -> "Worker manager"

Updated all imports in entry points, cluster/cluster.py, and tests/scheduler/test_scaling.py.

Run script fixes

Fixed broken imports in src/run_worker_manager_*.py scripts:

• run_worker_manager_baremetal_native.py: worker_adapter_native -> worker_manager_baremetal_native
• run_worker_manager_baremetal_fixed_native.py: worker_adapter_fixed_native -> worker_manager_baremetal_fixed_native
• run_worker_manager_aws_raw_ecs.py: worker_adapter_ecs -> worker_manager_aws_raw_ecs
• run_worker_manager_symphony.py: worker_adapter_symphony -> worker_manager_symphony

Test renames

• tests/scheduler/test_scaling.py: _run_native_worker_adapter -> _run_native_worker_manager, variable adapter -> manager

6. TOML section names in entry point parse() calls

• "native_worker_adapter" -> "native_worker_manager" (+ description: "Scaler Native Worker Manager")
• "fixed_native_worker_adapter" -> "fixed_native_worker_manager" (+ description: "Scaler Fixed Native Worker Manager")
• "symphony_worker_adapter" -> "symphony_worker_manager" (+ description: "Scaler Symphony Worker Manager")
• "ecs_worker_adapter" -> "ecs_worker_manager" (+ description: "Scaler ECS Worker Manager")
• "aws_hpc_worker_adapter" -> "aws_hpc_worker_manager" (+ description: "Scaler AWS HPC Worker Manager")

Local variables in entry points also renamed (e.g., native_adapter_config -> native_manager_config, native_worker_adapter -> native_worker_manager).

7. Docs directory rename + prose updates

• docs/source/tutorials/worker_adapters/ -> worker_manager_adapter/
• Updated index.rst toctree references
• Updated configuration.rst cross-reference path
• Replaced "Worker Adapter(s)" with "Worker Manager(s)" in all docs under the renamed directory:
  • index.rst, native.rst, fixed_native.rst, common_parameters.rst, aws_hpc/index.rst, aws_hpc/setup.rst
• Updated features.rst: heading + prose
• Updated configuration.rst: heading, CLI commands table, TOML section names
• Updated scaling.rst: all "Worker Adapter" -> "Worker Manager", "Scaling Controller" -> "Scaling Policy", CLI command names, protocol message names

8. README.md updates

• CLI commands: scaler_worker_adapter_* -> scaler_worker_manager_* (with updated baremetal paths)
• TOML sections: [native_worker_adapter] -> [native_worker_manager], etc.
• Prose: "Worker Adapter" -> "Worker Manager" throughout section heading and body

9. Final-sweep comment/docstring fixes

Remaining "worker adapter" references in comments, docstrings, and UI strings:

• worker_manager_adapter/aws_hpc/__init__.py: "AWS HPC Worker Adapter" -> "AWS HPC Worker Manager"
• worker_manager_adapter/aws_hpc/heartbeat_manager.py: "worker adapter" -> "worker manager" in docstring
• capability_scaling.py: "scaling controller" -> "scaling policy", "worker adapter" -> "worker manager" in class docstring
• tests/scheduler/test_scaling.py: TestFixedElasticScaling docstring "worker adapters" -> "worker managers"
• tests/worker_manager_adapter/aws_hpc/aws_hpc_test_harness.py: "Worker Adapter Test Harness" -> "Worker Manager Test Harness" (docstring, argparse description, print banner)

10. Minor formatting / import-order fixes

• client_agent.py: import reorder (UVYMQException before YMQException alphabetically)
• io/uv_ymq/__init__.py: collapsed multi-line import to single line
• io/uv_ymq/_uv_ymq.pyi: removed blank lines in class bodies
• io/uv_ymq/sockets.py: minor formatting
• ui/common/task_graph.py: minor formatting (function call parentheses)
• worker/worker.py: added trailing comma in multi-line set literal
• worker_manager_adapter/symphony/worker_manager.py: added trailing comma in multi-line set literal
• tests/config/test_config_class.py: updated WorkerAdapterConfig -> WorkerManagerConfig in config tests
• tests/io/uv_ymq/test_sockets.py: minor formatting

Files changed summary

• Added: policies/library/__init__.py, policies/library/utility.py, vanilla_policy_controller.py
• Deleted: policies/utility.py, worker_adapter_controller.py
• Renamed:
  • worker_adapter_controller.py -> worker_manager_controller.py
  • config/common/worker_adapter.py -> worker_manager.py
  • config/section/native_worker_adapter.py -> native_worker_manager.py
  • config/section/fixed_native_worker_adapter.py -> fixed_native_worker_manager.py
  • config/section/ecs_worker_adapter.py -> ecs_worker_manager.py
  • config/section/symphony_worker_adapter.py -> symphony_worker_manager.py
  • config/section/aws_hpc_worker_adapter.py -> aws_hpc_worker_manager.py
  • worker_manager_adapter/symphony/worker_adapter.py -> worker_manager.py
  • docs/source/tutorials/worker_adapters/ -> worker_manager_adapter/
• Modified: 65 files total (see git diff master...HEAD --stat)