Documentation updates:
- KNOWN_ISSUES.md: correct #6 (datum handling), resolve#10
(delete_bom_entry) and #11 (silo icons), fix stale formatDate
reference, mark completed next steps, add new next steps.
- INTEGRATION_PLAN.md: correct ztools SDK migration claim.
kc_format.py (#277):
- New _manifest_enrich_hook: populates part_uuid from SiloItemId and
silo_instance from Silo API URL on every .kc save.
- New update_manifest_fields(): public API to update manifest fields
in an already-saved .kc ZIP (used for post-upload revision_hash).
mods/silo submodule (#276):
- New bom_sync.py extraction engine.
- Post-commit hooks for BOM sync and manifest revision update.
- SSE bom_merged signal + Activity pane handler.
- merge_bom_json client method (forward-looking).
Refs: #276, #277
