Add CACHE_ENABLED env var to toggle Redis caching (v2.2.1)

- Set CACHE_ENABLED=false to disable caching without stopping Redis
- Defaults to true (caching enabled)
- Useful for draft periods requiring real-time data

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

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

VERSION

@@ -1 +1 @@
-2.2.0
+2.2.1

app/dependencies.py

@@ -26,8 +26,13 @@ logger = logging.getLogger('discord_app')
 REDIS_HOST = os.environ.get('REDIS_HOST', 'localhost')
 REDIS_PORT = int(os.environ.get('REDIS_PORT', '6379'))
 REDIS_DB = int(os.environ.get('REDIS_DB', '0'))
+CACHE_ENABLED = os.environ.get('CACHE_ENABLED', 'true').lower() == 'true'
 
 # Initialize Redis client with connection error handling
+if not CACHE_ENABLED:
+    logger.info("Caching disabled via CACHE_ENABLED=false")
+    redis_client = None
+else:
     try:
         redis_client = Redis(
             host=REDIS_HOST,