Accelerate Rs Search Postgres

The live reference instance exposes /v1/search, /v1/search/semantic, and /v1/search/hybrid over a broad owner-visible package. API benchmarks show search as the slowest read-surface path, and broad lexical queries can fail with Postgres 53100 shared-memory errors under Docker.

Real API benchmarking on the live Postgres reference instance showed /v1/search as a P0 read-surface bottleneck:

The CLI and executable tests SHALL consume the real public or reference-designated surfaces of the implementation rather than private database shortcuts or website-only glue.