feat(rag): connect bp_compliance_ce vector corpus to SDK

- Switch LegalRAGClient from empty bp_legal_corpus to bp_compliance_ce
  collection (3,734 chunks across 14 regulations)
- Replace embedding-service (384-dim MiniLM) with Ollama bge-m3 (1024-dim)
- Add standalone RAG search endpoint: POST /sdk/v1/rag/search
- Add regulations list endpoint: GET /sdk/v1/rag/regulations
- Add QDRANT_HOST/PORT env vars to docker-compose.yml
- Update regulation ID mapping to match actual Qdrant payload schema
- Update determineRelevantRegulations for CE corpus regulation IDs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -148,6 +148,8 @@ services:
       AUDIT_LOG_PROMPTS: ${AUDIT_LOG_PROMPTS:-true}
       ALLOWED_ORIGINS: "*"
       TTS_SERVICE_URL: http://compliance-tts-service:8095
+      QDRANT_HOST: bp-core-qdrant
+      QDRANT_PORT: "6333"
     extra_hosts:
       - "host.docker.internal:host-gateway"
     depends_on: