feat(eval): RAGAS evaluation framework + RAG pipeline improvements

chore: bump to v1.0.0 + update docs with Vercel live URL

feat(phase4): multi-state RERA expansion + pipeline hardening

docs: LLD v0.5.0 — Phase 6 complete, 4-state ingestion documented

feat: Phase 4 complete — UP RERA ingestion (Rules 2016 + Regulations 2019)

docs: update HLD/LLD to v0.4.0/v0.3.0 for Phase 3

docs: update HLD/LLD to v0.3.0, add README, ADR 004-005

docs: update HLD + LLD to Phase 1 complete

docs: add HLD, LLD, and ADR 001-003 for Phase 0

feat: Phase 0 complete — RERA RAG pipeline with FastAPI