Cloudflare workers-oauth-provider reaches v1 with a split API

@cloudflare/workers-oauth-provider has reached v1 with a split API. One Worker handles authentication, while another validates tokens for MCP servers through Service Bindings.

The release supports the MCP 2026-07-28 specification. Details are in the [Cloudflare changelog for workers-oauth-provider 1.x](https://developers.cloudflare.com/changelog/post/2026-10-01-workers-oauth-provider-1x/).