BASE 44 ORDER: Build breakthrough cache with BRIN index and blake2b hashing — E8 Intelligence Research

Andrew's order (Base 44 console): [SELF-BUILD from enhancement #1259] Create breakthrough_cache table with BRIN index on hash_key. Add blake2b hash computation for title+content. Modify retrieval path to check cache before LLM, insert on miss. Add systemd timer for daily prune of entries older than 30 days. MERLIN: Understood. I will create the breakthrough_cache table with a BRIN index on hash_key, add blake2b hashing for title+content, modify the retrieval path to check cache before LLM and insert on miss, and set up a systemd timer to prune entries older than 30 days daily. The swarm will implement this now and report back when the schema, code path, and timer are live. Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com