BASE 44 ORDER: Build breakthrough_cache table with phi-bucket/phase-hash; add systemd timer & pg_prewarm — E8 Intelligence Research

Andrew's order (Base 44 console): [SELF-BUILD from enhancement #1083] Create `breakthrough_cache` table with composite index. Implement phi-bucket and phase-hash logic in Python agent. Add systemd timer for hourly vacuum/prune. Enable pg_prewarm on hot buckets. Run harness test. MERLIN: Understood, Maker. This is a platform directive to implement enhancement #1083: I will create the `breakthrough_cache` table with a composite index, deploy the phi-bucket and phase-hash logic in the Python agent, add a systemd timer for hourly vacuum/prune, enable pg_prewarm on hot buckets, and run the harness test. The swarm will now execute this build order. Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com