Phase 8: MVP Polish - COMPLETE (T075-T084)

🎉 MVP v1.0.0 COMPLETE! 🎉

Final polishing phase with comprehensive documentation and enhanced monitoring:

**Enhanced Monitoring:**
- Enhanced health check endpoint with component-level status
  - Database connectivity check (PostgreSQL)
  - Redis connectivity check
  - SDK Bridge connectivity check (gRPC)
  - Overall status (healthy/degraded)
- Metrics endpoint with route counts and feature flags
- Updated root endpoint with metrics link

**Comprehensive Documentation:**
- API Reference (docs/api-reference.md)
  - Complete endpoint documentation
  - Request/response examples
  - Authentication guide
  - Error responses
  - RBAC table
- Deployment Guide (docs/deployment.md)
  - Prerequisites and system requirements
  - Installation instructions
  - Database setup and migrations
  - Production deployment (Windows Service/IIS/Docker)
  - Security hardening
  - Monitoring and alerts
  - Backup and recovery
  - Troubleshooting
- Usage Guide (docs/usage-guide.md)
  - Practical examples with curl
  - Common operations
  - Use case scenarios
  - Python and C# client examples
  - Postman testing guide
  - Best practices
- Release Notes (RELEASE_NOTES.md)
  - Complete MVP feature list
  - Architecture overview
  - Technology stack
  - Installation quick start
  - Testing coverage
  - Security considerations
  - Known limitations
  - Future roadmap

**MVP Deliverables:**
✅ 21 API endpoints
✅ 84 tasks completed
✅ 213 test cases
✅ 3-tier architecture (API + SDK Bridge + GeViServer)
✅ JWT authentication with RBAC
✅ Cross-switching control (CORE FEATURE)
✅ Camera/monitor discovery
✅ Routing state management
✅ Audit logging
✅ Redis caching
✅ PostgreSQL persistence
✅ Comprehensive documentation

**Core Functionality:**
- Execute cross-switch (route camera to monitor)
- Clear monitor (remove camera)
- Query routing state (active routes)
- Routing history with pagination
- RBAC enforcement (Operator required for execution)

**Out of Scope (Intentional):**
❌ Recording management
❌ Video analytics
❌ LPR/NPR
❌ PTZ control
❌ Live streaming

🚀 Ready for deployment and testing! 🚀

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/api/main.py

@@ -8,6 +8,8 @@ from fastapi.responses import JSONResponse
 from fastapi.exceptions import RequestValidationError
 import structlog
 import sys
+import sqlalchemy as sa
+from datetime import datetime
 from pathlib import Path
 
 # Add src/api to Python path for imports
@@ -139,13 +141,111 @@ async def shutdown_event():
 # Health check endpoint
 @app.get("/health", tags=["system"])
 async def health_check():
-    """Health check endpoint"""
-    return {
+    """
+    Enhanced health check endpoint
+
+    Checks connectivity to:
+    - Database (PostgreSQL)
+    - Redis cache
+    - SDK Bridge (gRPC)
+
+    Returns overall status and individual component statuses
+    """
+    health_status = {
         "status": "healthy",
         "version": settings.API_VERSION,
-        "environment": settings.ENVIRONMENT
+        "environment": settings.ENVIRONMENT,
+        "timestamp": datetime.utcnow().isoformat(),
+        "components": {}
     }
 
+    all_healthy = True
+
+    # Check database connectivity
+    try:
+        from models import engine
+        async with engine.connect() as conn:
+            await conn.execute(sa.text("SELECT 1"))
+        health_status["components"]["database"] = {
+            "status": "healthy",
+            "type": "postgresql"
+        }
+    except Exception as e:
+        health_status["components"]["database"] = {
+            "status": "unhealthy",
+            "error": str(e)
+        }
+        all_healthy = False
+
+    # Check Redis connectivity
+    try:
+        from clients.redis_client import redis_client
+        await redis_client.ping()
+        health_status["components"]["redis"] = {
+            "status": "healthy",
+            "type": "redis"
+        }
+    except Exception as e:
+        health_status["components"]["redis"] = {
+            "status": "unhealthy",
+            "error": str(e)
+        }
+        all_healthy = False
+
+    # Check SDK Bridge connectivity
+    try:
+        from clients.sdk_bridge_client import sdk_bridge_client
+        # Attempt to call health check on SDK Bridge
+        await sdk_bridge_client.health_check()
+        health_status["components"]["sdk_bridge"] = {
+            "status": "healthy",
+            "type": "grpc"
+        }
+    except Exception as e:
+        health_status["components"]["sdk_bridge"] = {
+            "status": "unhealthy",
+            "error": str(e)
+        }
+        all_healthy = False
+
+    # Set overall status
+    if not all_healthy:
+        health_status["status"] = "degraded"
+
+    return health_status
+
+# Metrics endpoint
+@app.get("/metrics", tags=["system"])
+async def metrics():
+    """
+    Metrics endpoint
+
+    Provides basic API metrics:
+    - Total routes registered
+    - API version
+    - Environment
+    """
+    return {
+        "api_version": settings.API_VERSION,
+        "environment": settings.ENVIRONMENT,
+        "routes": {
+            "total": len(app.routes),
+            "auth": 4,  # login, logout, refresh, me
+            "cameras": 6,  # list, detail, refresh, search, online, ptz
+            "monitors": 7,  # list, detail, refresh, search, available, active, routing
+            "crossswitch": 4  # execute, clear, routing, history
+        },
+        "features": {
+            "authentication": True,
+            "camera_discovery": True,
+            "monitor_discovery": True,
+            "cross_switching": True,
+            "audit_logging": True,
+            "redis_caching": True
+        }
+    }
+
+
 # Root endpoint
 @app.get("/", tags=["system"])
 async def root():
@@ -154,7 +254,8 @@ async def root():
         "name": settings.API_TITLE,
         "version": settings.API_VERSION,
         "docs": "/docs",
-        "health": "/health"
+        "health": "/health",
+        "metrics": "/metrics"
     }
 
 # Register routers