feat(contracts): expand CGP schema coverage

[POWERFULMOVES]

Summary

• expand the geometry CGP schema to describe super nodes, constellations, anchor encryption, and enriched point metadata
• allow optional signatures and metadata fields needed by gateway persistence and tooling

Testing

• python - <<'PY'
  import json
  from jsonschema import validate
  from pathlib import Path

schema = json.loads(Path('pmoves/contracts/schemas/geometry/cgp.v1.schema.json').read_text())
packet = json.loads('{"type":"geometry.cgp.v1","data":{"spec":"chit.cgp.v0.1","super_nodes":[{"constellations":[{"id":"c.test.1","summary":"beat-aligned hook","spectrum":[0.05,0.1,0.2,0.3,0.2,0.1,0.03,0.02],"points":[{"id":"p.test.1","modality":"video","ref_id":"yt123","t_start":12.5,"frame_idx":300,"proj":0.8,"conf":0.9,"text":"chorus line"}]}]}]}}')
validate(instance=packet['data'], schema=schema)
print('validation ok')
PY

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https://chatgpt.com/codex/tasks/task_b_68ce3b127c1483249fee2e282ecda0a9

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📥 Commits

Reviewing files that changed from the base of the PR and between aae7be7 and 583bafc.

📒 Files selected for processing (1)

• pmoves/contracts/schemas/geometry/cgp.v1.schema.json (8 hunks)

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

[P1] Keep CGP meta non-null or relax API model

The schema now allows meta to be null and adds additionalProperties at the root, but the gateway still validates requests with CGP.meta: Dict[str, Any] (see gateway/api/chit.py). Any client using the schema to validate and sending "meta": null will pass schema validation but FastAPI/Pydantic rejects the payload with a 422 because the field is not optional. Either revert the schema to require an object or update the API model to accept None to keep the contract consistent.

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