feat(redis): implement connection pooling and key migration for Redis

- Introduced a connection pool for Redis to improve resource management and reduce connection churn.
- Added backward compatibility for Redis key formats, migrating legacy keys to new formats during access.
- Enhanced metrics for tracking key migration progress and connection pool health.
- Updated Redis client interactions across the application to utilize the new pooling mechanism.
- Implemented health checks and logging for Redis connections to improve operational visibility.

Author: abretonc7s

packages/sdk-socket-server-next/CHANGES.md

@@ -0,0 +1,28 @@
+# Changelog
+
+## Redis Connection Management Improvements
+
+1. **Connection Pool Implementation**
+   - Replace the singleton Redis client with a properly managed connection pool
+   - Reduce minimum connections from 15 to 3 for startup efficiency
+   - Increase maximum connections to 50 for high-throughput scenarios
+   - Configure pool parameters via environment variables (REDIS_POOL_MIN, REDIS_POOL_MAX)
+
+2. **Socket.IO Redis Adapter Integration**
+   - Ensure Socket.IO cluster support with proper Redis adapter configuration
+   - Fix compatibility issues between Socket.IO and ioredis library
+
+3. **Monitoring and Metrics**
+   - Add Redis pool metrics for connection usage tracking
+   - Add API endpoint for monitoring pool health (/redis-pool-stats)
+   - Log connection pool statistics for better operational visibility
+
+4. **Improved Stability**
+   - Add graceful shutdown to properly close Redis connections
+   - Implement health checking with automatic connection recovery
+   - Validate connections to ensure they're working properly
+
+5. **Backward Compatibility**
+   - Maintain existing API through proxy mechanism
+   - Support existing key migration patterns
+   - Fix redundant connection logs

packages/sdk-socket-server-next/package.json

@@ -49,14 +49,14 @@
     "express-rate-limit": "^7.1.5",
     "generic-pool": "^3.9.0",
     "helmet": "^5.1.1",
-    "ioredis": "^5.3.2",
+    "ioredis": "^5.6.0",
     "logform": "^2.6.0",
     "lru-cache": "^10.0.0",
     "prom-client": "^15.1.3",
     "rate-limiter-flexible": "^2.3.8",
     "redis": "^4.6.12",
     "rimraf": "^4.4.0",
-    "socket.io": "^4.4.1",
+    "socket.io": "^4.7.2",
     "uuid": "^9.0.1",
     "winston": "^3.11.0",
     "winston-loki": "^6.0.8"