fix(config) : disable rate_limiter config requiring uninstalled component

The mcp_auth rate limiter requires symfony/rate-limiter which is not
installed. Renamed to .disabled until the MCP stack is ready.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config/packages/rate_limiter.yaml

@@ -1,6 +0,0 @@
-framework:
-    rate_limiter:
-        mcp_auth:
-            policy: sliding_window
-            limit: 5
-            interval: '1 minute'