v0.52.0

Added

• Added historical-cadence stall detection to the LLM-free supervisor, with
  operator controls for disabling or tuning the predictive supplement.
• Added synapse event-query for read-only temporal event-log queries over the
  hub SQLite store, covering task timelines, point-in-time task state,
  path-touch windows, and historical claim conflicts.
• Added tools/import_merge_risk.py to combine changed paths or local branch
  diffs with claimed paths, Python import neighbours, CODEOWNERS, and mapped test
  owners for advisory pre-merge risk checks.
• Added tools/generated_dependency_claims.py to map source paths to generated
  outputs that should share the same file-scope claim and release receipt, with
  JSON, --claim-args, and integrity-check output.
• Added tools/semantic_claims.py to resolve module, symbol, API, source, test,
  generated, and migration selectors into ordinary file-scope claim paths and
  receipt-ready JSON.