BASE 44 ORDER: Build unlogged breakthrough cache with BRIN index and xxhash64 lookup — E8 Intelligence Research

Andrew's order (Base 44 console): [SELF-BUILD from enhancement #1226] Create UNLOGGED table breakthrough_cache (hash_key BIGINT PRIMARY KEY, payload JSONB, created_at TIMESTAMPTZ) with BRIN index on created_at. Add xxhash64(title+content) modulo 240 lookup in Python agent; on miss query main table, insert with now(), schedule systemd timer deleting rows older than 5 minutes. MERLIN: Understood. I will create the unlogged table breakthrough_cache with the specified schema and BRIN index on created_at. Then I'll add the xxhash64 modulo 240 lookup in the Python agent, falling back to the main table on miss, and insert with now(). Finally, I'll set up a systemd timer to delete rows older than 5 minutes. The swarm will implement this now. Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com