Add corridor/river/terrace pipelines, hypothesis generation, telemetry, and artifact writers

[pdxvoiceteacher]

Motivation

• Introduce detection and downstream processing for discovery corridors, rivers, and terraces so the kernel can produce advisory artifacts and hypothesis candidates from Psi gradients.
• Add telemetry and artifact writers to record kernel step metrics and phase outputs for auditing and Atlas ingestion.
• Provide small inference utilities to convert corridor detections into exploration vectors and hypotheses for downstream analysis.

Description

• Added corridor detection (discovery_corridor_detector.py), exploration vector generator (exploration_vectors.py), hypothesis confidence/inferrer/generator (hypothesis_confidence.py, mechanism_inference.py, hypothesis_generator.py), and a Hypothesis dataclass under models/hypothesis.py with exports updated in models/__init__.py.
• Implemented river and terrace PDE steps and helpers (river_formation.py, terrace_formation.py) with artifact payloads and writers (write_river_artifact.py, tools/write_terrace_artifact.py, tools/write_corridor_artifact.py).
• Extended evolution_engine.py with telemetry emission, tel-event persistence, and high-level phase runners (run_river_phase, run_terrace_phase, run_corridor_detection, run_hypothesis_generation) and wired new kernel functions into kernel/__init__.py exports.
• Added kernel telemetry generator (telemetry.py), bridge artifact builders (bridge/build_terrace_formation_map.py, bridge/build_hypothesis_map.py, plus a helper in build_discovery_corridor_map.py), and small utilities for writing/serializing artifacts and JSON.
• Project/testing config additions: new pytest.ini, python/requirements.txt (numpy>=1.24), and test fixtures in python/tests/conftest.py.

Testing

• Added and ran unit tests covering corridor detection, discovery corridor artifact generation and writer, hypothesis inference/generation and artifact, river formation dynamics, terrace formation dynamics and dict/list compatibility, and evolution engine telemetry emission; tests are in python/tests/*.
• Ran the test suite with pytest and the added tests completed successfully (all tests passed).

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Codex Task