CLAUDE: Fix type annotations in CacheManager for JSON-serializable types

Update CacheManager.get() and CacheManager.set() type annotations to
accept Any JSON-serializable type (dict, list, str, int, bool, None)
instead of just dict.

This fixes type checker warnings in base_service.py where lists are
cached for API responses. The runtime behavior was already correct,
this just aligns the type hints with actual usage.

Changes:
- CacheManager.get() return type: Optional[dict] -> Optional[Any]
- CacheManager.set() data param: dict -> Any
- Updated docstrings to clarify JSON-serializable types

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

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

utils/cache.py

@@ -4,7 +4,7 @@ Redis caching utilities for Discord Bot v2.0
 Provides optional Redis caching functionality for API responses.
 """
 import logging
-from typing import Optional
+from typing import Optional, Any
 import json
 
 try:
@@ -108,7 +108,7 @@ class CacheManager:
         """
         return f"{prefix}:{identifier}"
         
-    async def get(self, key: str) -> Optional[dict]:
+    async def get(self, key: str) -> Optional[Any]:
         """
         Get cached data.
 
@@ -116,7 +116,7 @@ class CacheManager:
             key: Cache key
 
         Returns:
-            Cached data as dict or None if not found/error
+            Cached data (any JSON-serializable type) or None if not found/error
         """
         client = await self._get_client()
         if not client:
@@ -134,13 +134,13 @@ class CacheManager:
         logger.debug(f"Cache miss: {key}")
         return None
         
-    async def set(self, key: str, data: dict, ttl: Optional[int] = None) -> None:
+    async def set(self, key: str, data: Any, ttl: Optional[int] = None) -> None:
         """
         Set cached data.
 
         Args:
             key: Cache key
-            data: Data to cache (must be JSON serializable)
+            data: Data to cache (any JSON-serializable type: dict, list, str, int, bool, None)
             ttl: Time-to-live override (uses default if None)
         """
         client = await self._get_client()