Benchmark runs no longer touch production. A dedicated Fly VM runs LifeBench with its own ephemeral Postgres. pgvector now survives Fly Postgres restarts. Infra costs dropped 58%.

Fixed

• pgvector survives restarts (custom Docker image with postgresql-17-pgvector baked in)
• Parallel migration deadlock workaround in benchmark entrypoint

Added

• Benchmark VM: self-contained Fly machine with ephemeral Postgres + CI API + LifeBench harness
• Custom Postgres image: db/Dockerfile extends flyio/postgres-flex:17.2 with pgvector 0.8.2

Infrastructure

• Fly costs reduced
• Production DB cleaned
• New files: db/Dockerfile, benchmark/Dockerfile, benchmark/benchmark-entrypoint.sh, benchmark/fly.toml