Remove deprecated GetTaskLogs RPC

[claude]

Removes the deprecated GetTaskLogs RPC and all associated code. All callers were previously migrated to use FetchLogs with regex source patterns directly.

Removed:

• Proto (cluster.proto): GetTaskLogsRequest, TaskLogBatch, GetTaskLogsResponse messages and GetTaskLogs RPC
• Service (service.py): get_task_logs forwarding method, unused build_log_source import, DEFAULT_MAX_TOTAL_LINES constant
• Docs (vue-refactor.md): Updated stale GetTaskLogs example to use FetchLogs

Not removed:

• Test helper methods named get_task_logs in _docker_cluster.py and conftest.py - these already use FetchLogs internally

Test plan:

• pre-commit passes
• test_dashboard.py - 32 passed
• Full iris unit test suite (excluding e2e/chaos) - 1669 passed, 1 skipped

Closes #4201

Generated with Claude Code

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[rjpower]

@claude rebase this PR to main, we shouldn't have any more GetTaskLogs clients at this point.

[claude]

Claude finished @rjpower's task in 8m 55s —— View job

---

Rebased to main ✅

The branch is now rebased onto 7dd69d706 (current origin/main) as a single commit d2462e602.

What was done

• Branch was 20 commits behind origin/main. A literal rebase produced 30+ unrelated add/add conflicts (file moves under tests/, tests/snapshots/, uv.lock), so I reset to origin/main and re-applied the GetTaskLogs removal cleanly.
• The proto file was renamed cluster.proto → controller.proto upstream — applied the changes there.
• Removed GetTaskLogsRequest / TaskLogBatch / GetTaskLogsResponse messages and the GetTaskLogs RPC.
• Removed get_task_logs(), the now-unused re and build_log_source imports, and the DEFAULT_MAX_TOTAL_LINES constant from service.py.
• Regenerated controller_pb2.py, controller_pb2.pyi, and controller_connect.py via lib/iris/scripts/generate_protos.py.
• lib/iris/docs/vue-refactor.md no longer exists in main, so no doc update is needed.
• Verified zero GetTaskLogs / get_task_logs references remain in lib/iris/src/iris/. The test helpers under tests/e2e/conftest.py and tests/e2e/_docker_cluster.py keep the local helper name get_task_logs but already implement it via FetchLogs — left as-is, matching the original PR's stated scope.

Final diff: 5 files, +63 / -269 (most of the deletes are in regenerated proto bindings).

How I tested

• ./infra/pre-commit.py --all-files --fix → OK (all hooks green, including pyrefly).
• uv run pytest tests/cluster/controller/test_service.py tests/cluster/test_attempt_logs.py → 53 passed.
• uv run pytest tests/cluster tests/rpc tests/log_server tests/cli tests/actor tests/client --ignore=tests/cluster/test_chaos.py → 1799 passed, 1 skipped in 90s.

Pushed to claude/issue-4201-20260328-1855. The PR (now 1 commit ahead of main) is ready for re-review.
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