Release v0.4.0 · khalidsaidi/eldapo

v0.4.0

This release lands benchmark correctness fixes, core stability improvements, and a local competitor race harness.

Benchmark generator distribution fix:
- scripts/bench/generate.ts now uses a coprime tag step (index * 5) to ensure deterministic full tag coverage.
- Added generator coverage guard test (tests/bench-generate.test.ts).
Forwarded benchmark correctness guard:
- /v1 forwarded responses now include x-eldapo-core: 1 when served by core.
- scripts/bench/run.ts validates this header for the v1_forwarded target and fails if missing.
Core p99 stability improvements:
- Added empty-candidate and no-filter fast paths in core search.
- Reduced bitmap churn in filter evaluation via borrow/own strategy.
Competitor race harness added:
- docker-compose.race.yml includes Redis Sets, RediSearch, and OpenLDAP services.
- Added loaders and shim servers for race targets under scripts/race/* and src/competitors/*.