Add room and analytics services with CRUD API endpoints

- Implement RoomService for room management and metrics - Add
AnalyticsService for sensor data analytics and trends - Extend models
with Room, RoomCreate, RoomUpdate, RoomInfo - Add room CRUD endpoints to
FastAPI app - Add database connection logic for MongoDB and Redis -
Refactor sensor service logic into SensorService class

microservices/sensor-service/database.py

@@ -0,0 +1,66 @@
+"""
+Database connection and management for sensor service
+"""
+
+import asyncio
+import logging
+from motor.motor_asyncio import AsyncIOMotorClient
+import redis.asyncio as redis
+from typing import Optional
+import os
+
+logger = logging.getLogger(__name__)
+
+# Global database connections
+mongo_client: Optional[AsyncIOMotorClient] = None
+redis_client: Optional[redis.Redis] = None
+database = None
+
+async def connect_to_mongo():
+    """Connect to MongoDB"""
+    global mongo_client, database
+    
+    try:
+        mongo_url = os.getenv("MONGO_URL", "mongodb://admin:password123@mongodb:27017/energy_dashboard_sensors?authSource=admin")
+        
+        mongo_client = AsyncIOMotorClient(mongo_url)
+        database = mongo_client.energy_dashboard_sensors
+        
+        # Test connection
+        await mongo_client.admin.command('ping')
+        logger.info("Connected to MongoDB successfully")
+        
+    except Exception as e:
+        logger.error(f"Failed to connect to MongoDB: {e}")
+        raise
+
+async def close_mongo_connection():
+    """Close MongoDB connection"""
+    global mongo_client
+    if mongo_client:
+        mongo_client.close()
+        logger.info("Closed MongoDB connection")
+
+async def connect_to_redis():
+    """Connect to Redis"""
+    global redis_client
+    
+    try:
+        redis_url = os.getenv("REDIS_URL", "redis://redis:6379")
+        redis_client = redis.from_url(redis_url, decode_responses=True)
+        
+        # Test connection
+        await redis_client.ping()
+        logger.info("Connected to Redis successfully")
+        
+    except Exception as e:
+        logger.error(f"Failed to connect to Redis: {e}")
+        raise
+
+async def get_database():
+    """Get database instance"""
+    return database
+
+async def get_redis():
+    """Get Redis client instance"""
+    return redis_client