Add WHOOSH search service with BACKBEAT integration

Complete implementation:
- Go-based search service with PostgreSQL and Redis backend
- BACKBEAT SDK integration for beat-aware search operations
- Docker containerization with multi-stage builds
- Comprehensive API endpoints for project analysis and search
- Database migrations and schema management
- GITEA integration for repository management
- Team composition analysis and recommendations

Key features:
- Beat-synchronized search operations with timing coordination
- Phase-based operation tracking (started → querying → ranking → completed)
- Docker Swarm deployment configuration
- Health checks and monitoring
- Secure configuration with environment variables

Architecture:
- Microservice design with clean API boundaries
- Background processing for long-running analysis
- Modular internal structure with proper separation of concerns
- Integration with CHORUS ecosystem via BACKBEAT timing

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.env.example

@@ -0,0 +1,39 @@
+# WHOOSH Configuration Example
+# Copy to .env and configure for local development
+
+# Database Configuration
+WHOOSH_DATABASE_HOST=localhost
+WHOOSH_DATABASE_PORT=5432
+WHOOSH_DATABASE_DB_NAME=whoosh
+WHOOSH_DATABASE_USERNAME=whoosh
+WHOOSH_DATABASE_PASSWORD=your_database_password_here
+WHOOSH_DATABASE_SSL_MODE=disable
+WHOOSH_DATABASE_AUTO_MIGRATE=true
+
+# Server Configuration
+WHOOSH_SERVER_LISTEN_ADDR=:8080
+WHOOSH_SERVER_READ_TIMEOUT=30s
+WHOOSH_SERVER_WRITE_TIMEOUT=30s
+WHOOSH_SERVER_SHUTDOWN_TIMEOUT=30s
+
+# GITEA Configuration
+WHOOSH_GITEA_BASE_URL=http://ironwood:3000
+WHOOSH_GITEA_TOKEN=your_gitea_token_here
+WHOOSH_GITEA_WEBHOOK_PATH=/webhooks/gitea
+WHOOSH_GITEA_WEBHOOK_TOKEN=your_webhook_secret_here
+
+# Authentication Configuration
+WHOOSH_AUTH_JWT_SECRET=your_jwt_secret_here
+WHOOSH_AUTH_SERVICE_TOKENS=token1,token2,token3
+WHOOSH_AUTH_JWT_EXPIRY=24h
+
+# Logging Configuration
+WHOOSH_LOGGING_LEVEL=debug
+WHOOSH_LOGGING_ENVIRONMENT=development
+
+# Redis Configuration (optional)
+WHOOSH_REDIS_ENABLED=false
+WHOOSH_REDIS_HOST=localhost
+WHOOSH_REDIS_PORT=6379
+WHOOSH_REDIS_PASSWORD=your_redis_password
+WHOOSH_REDIS_DATABASE=0