OAuth protected resource metadata (root alias for the MCP resource)

Root-path alias of the MCP protected-resource document.

Compatibility fallback for clients that probe the root /.well-known/oauth-protected-resource instead of following the 401's resource_metadata pointer (the documented Claude Code behaviour). Safe because this deployment has exactly one OAuth-protected resource, so the root and path-scoped documents are the same body.

Two acknowledged trades:

• RFC 9728 §3 says this well-known path corresponds to resource identifier {base} (no path), and §3.3 has clients validate resource against the resource they queried. This body claims resource={base}/mcp — a strict path-deriving validator would reject it, but Claude's fallback validates against the MCP server URL ({base}/mcp), which is exactly what the alias exists to satisfy. That is the intended trade.
• The alias squats the deployment's only root PRM slot: a future non-MCP protected resource at {base} cannot get its own root document without breaking this fallback. The mounted MCP app must re-confirm the "exactly one OAuth-protected resource" premise before adding one.