PR Template - Sprint 21 Task 02

Task

Implement deterministic manifest hashing validation.

Summary

• Added deterministic SHA-256 hashing over canonical manifest payloads.

Scope

• src/pkg/orchestrator/manifest.py
• scripts/manifest_schema_regression.py
• tests/unit/test_orchestrator_manifest.py

Validation

• PYTHONPATH=src .venv/bin/python scripts/manifest_schema_regression.py