chore: recycle unused frame-drift monitoring

[serefyarar]

Recycle the unused daily frame-drift observation pipeline (IND-430 / IND-468). It had no API, UI, or product consumer. The writer, tests, design doc, and four snapshot/ledger tables go away.

Why

• Nothing in the product read frame_centroid_snapshots or cross_network_yield_snapshots.
• The user_context centroid corpus was already dead after user_contexts dropped; the adapter measured only premise and intent embeddings.
• Keeping a daily BullMQ scheduler and two adapters with no reader is maintenance for a question nobody is asking.

What changed

• Delete FrameDriftQueue, FrameDriftMonitoringService, both adapters, config, and their tests.
• Unwire startup/shutdown in main.ts; stop flushing the observation tables in db-flush.
• Drop schema tables and unused bigint/check imports.
• Remove the four deleted specs from services/api/.test-isolated.
• Migration 0159_drop_frame_drift_monitoring drops:
  • frame_centroid_snapshots
  • cross_network_yield_snapshots
  • frame_drift_observation_runs
  • frame_drift_execution_attempts

Breaking: existing snapshot rows are capture-time measurements, not reconstructed history. They are deleted with the writer. No dual-read.

Restore

git checkout 061d0c51e -- \
  docs/design/frame-drift-monitoring.md \
  services/api/src/lib/frame-drift.config.ts \
  services/api/src/lib/tests/frame-drift.config.spec.ts \
  services/api/src/queues/frame-drift.queue.ts \
  services/api/src/queues/tests/frame-drift.queue.isolated.ts \
  services/api/src/queues/tests/frame-drift.hermetic.isolated.ts \
  services/api/src/services/frame-drift-monitoring.service.ts \
  services/api/src/services/tests/frame-drift-monitoring.service.spec.ts \
  services/api/src/adapters/frame-drift.database.adapter.ts \
  services/api/src/adapters/frame-drift-execution-attempt.database.adapter.ts \
  services/api/tests/frame-drift.database.adapter.isolated.ts \
  services/api/tests/frame-drift-execution-attempt.database.adapter.isolated.ts

Then restore the four tables from services/api/src/schemas/database.schema.ts at that SHA (create migrations 0093 / 0097 remain in history).

Recycle archive 404

indexnetwork/recycle/tree/main/frame-drift-monitoring is a 404 because cursor[bot] cannot write to that repo (git push and Contents API both 403). This PR does not link that path.

To publish the archive, grant Write to cursor[bot] on indexnetwork/recycle and ask this agent to push, or copy from 061d0c51e following the opportunity-discovery-dedup-merge/ layout.

Verification

• bun run --cwd packages/protocol build && bun run --cwd services/api typecheck — pass
• Isolated manifest loadIsolatedTestInventory — pass after dropping the four deleted files
• Prior CI test / provider-free-security failed on that manifest; fix is on this revision