Add CAOS surface registry and proactivity policy

[caosos]

Summary

This stacked draft PR adds the first cockpit-awareness layer on top of the hydration-gates branch.

What changed

• Added backend/app/services/surface_registry.py

  • Static/pure registry of CAOS surfaces Aria should know exist.
  • Includes Memory Console, Support Tickets, Admin Dashboard, Admin Docs, Artifacts, Files/Photos/Links, Engine Selector, Agent Swarm, Voice/Speech, Thread Search, WCW Meter, and Quick Capture.
  • Maps surface wake patterns to departments, display hints, and first actions.

• Added backend/app/services/proactivity_policy.py

  • Pure frontal-lobe policy classifier.
  • Classifies latency, bug/problem, code/deployment, memory/continuity, retrieval/connector, display/artifact, support ticket, surface navigation, and casual/direct turns.
  • Produces a receipt-friendly decision with primary_intent, wake_departments, matched_surfaces, display_hints, first_action, diagnose_before_ticket, allow_tools, and allow_connectors.

• Updated backend/app/services/chat_pipeline.py

  • Builds proactivity decision per turn.
  • Lets proactivity policy wake tools/connectors/summaries/seeds/lane workers when the user language indicates the relevant surface or department.
  • Adds proactivity policy into prompt sections and receipts.
  • Keeps admin tool behavior hot.

• Updated backend/app/services/artifact_builder.py

  • Persists proactivity_policy into receipt records.

Intent

Aria should know the cockpit she lives inside: memory console, support tickets, admin dashboard, docs, artifacts, files/photos/links, engine selector, agent swarm, voice settings, WCW meter, thread search, and quick capture.

This PR does not add new UI. It adds the backend registry/policy layer so later prompt/tool/display planning can use the same source of truth.

Safety

• Stacked on PR Fix chat hydration gates and standby tool prompt #1 (fix/chat-hydration-gates-v1).
• No changes to auth, secrets, billing, deployment config, or frontend.
• No capability removal.
• Pure policy modules only; no DB/tool/provider side effects in new files.
• Draft PR for review/preview only.