Update expired_at on the CacheEntry

Signed-off-by: Brian Hussey <[email protected]>

Author: Brian Hussey

mcpgateway/cache/resource_cache.py

@@ -156,6 +156,7 @@ def get(self, key: str) -> Optional[Any]:
             del self._cache[key]
             return None
 
+        entry.expires_at = now + self.ttl
         self._cache.move_to_end(key)
 
         return entry.value