docs: document reset_remote_mcp_server_auth meta-tool

[dgageot]

The mcp_catalog toolset now exposes a fifth meta-tool, reset_remote_mcp_server_auth, that allows users to clear persisted OAuth credentials for a remote MCP server. This is useful when an access token was revoked, authorization scopes changed, or the user needs to sign in with a different account.

This change updates the example configuration to document the new meta-tool and clarify when it becomes available. The implementation already supports the feature; this is purely a documentation update to keep the example in sync with the actual toolset behavior.

The meta-tool is only exposed once at least one server is enabled and is a no-op for servers using api_key or none authentication.

[docker-agent]

Assessment: 🟢 APPROVE

This is a documentation-only change adding a description of the new reset_remote_mcp_server_auth meta-tool to examples/mcp_catalog.yaml. The diff is accurate and consistent with the described behavior.

Reviewed: examples/mcp_catalog.yaml (+15 lines, documentation comment update)

No bugs, security issues, or correctness problems were found in the changed lines.