feat: set up SearXNG Docker container for Search Service (issue #44)
- SearXNG settings.yml with curated search engines for development:
Google, DuckDuckGo, Bing, Brave, Wikipedia, GitHub, StackOverflow,
crates.io, PyPI, docs.rs
- JSON API enabled for programmatic access by Search Service
- Rate limiter config (limiter.toml) with permissive internal settings
- Docker Compose snippet for standalone testing (port 8888)
- Pinned image version, healthcheck, minimal capabilities (cap_drop ALL)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
92214cdb4d