Merge origin/main into codex/dalidou-storage-foundation

Integrate codex/port-atocore-ops-client (operator client + operations
playbook) so the dalidou-storage-foundation branch can fast-forward
into main.

# Conflicts:
#	README.md

docs/operations.md

@@ -0,0 +1,96 @@
+# AtoCore Operations
+
+Current operating order for improving AtoCore:
+
+1. Retrieval-quality pass
+2. Wave 2 trusted-operational ingestion
+3. AtoDrive clarification
+4. Restore and ops validation
+
+## Retrieval-Quality Pass
+
+Current live behavior:
+
+- broad prompts like `gigabit` and `polisher` can surface archive/history noise
+- meaningful project prompts perform much better
+- ranking quality now matters more than raw corpus growth
+
+Use the operator client to audit retrieval:
+
+```bash
+python scripts/atocore_client.py audit-query "gigabit" 5
+python scripts/atocore_client.py audit-query "polisher" 5
+python scripts/atocore_client.py audit-query "mirror frame stiffness requirements and selected architecture" 5 p04-gigabit
+python scripts/atocore_client.py audit-query "interferometer error budget and vendor selection constraints" 5 p05-interferometer
+python scripts/atocore_client.py audit-query "polisher system map shared contracts and calibration workflow" 5 p06-polisher
+```
+
+What to improve:
+
+- reduce `_archive`, `pre-cleanup`, `pre-migration`, and `History` prominence
+- prefer current-status, decision, requirement, architecture-freeze, and milestone docs
+- prefer trusted project-state when it expresses current truth
+- avoid letting broad single-word prompts drift into stale chunks
+
+## Wave 2 Trusted-Operational Ingestion
+
+Do not ingest the whole PKM vault next.
+
+Prioritize, for each active project:
+
+- current status
+- current decisions
+- requirements baseline
+- architecture freeze / current baseline
+- milestone plan
+- next actions
+
+Useful commands:
+
+```bash
+python scripts/atocore_client.py project-state p04-gigabit
+python scripts/atocore_client.py project-state p05-interferometer
+python scripts/atocore_client.py project-state p06-polisher
+python scripts/atocore_client.py refresh-project p04-gigabit
+python scripts/atocore_client.py refresh-project p05-interferometer
+python scripts/atocore_client.py refresh-project p06-polisher
+```
+
+## AtoDrive Clarification
+
+Treat AtoDrive as a curated trusted-operational source, not a generic dump.
+
+Good candidates:
+
+- current dashboards
+- approved baselines
+- architecture freezes
+- decision logs
+- milestone and next-step views
+
+Avoid by default:
+
+- duplicated exports
+- stale snapshots
+- generic archives
+- exploratory notes that are not designated current truth
+
+## Restore and Ops Validation
+
+Backups are not enough until restore has been tested.
+
+Validate:
+
+- SQLite metadata restore
+- Chroma restore or rebuild
+- project registry restore
+- project refresh after recovery
+- retrieval audit before and after recovery
+
+Baseline capture:
+
+```bash
+python scripts/atocore_client.py health
+python scripts/atocore_client.py stats
+python scripts/atocore_client.py projects
+```