Cloudflare events have no runtime version and no server name

[isaacs]

packages/cloudflare/src/client.ts:55:

// TODO: Grab version information
runtime: { name: 'cloudflare' },
// TODO: Add server name

Bun reports {name:'bun', version:'1.3.14'} and Deno reports the Deno version. Cloudflare reports neither a version nor a server_name, so events cannot be grouped or filtered by worker.

Work item. Set server_name from the script name where it is available (env binding metadata or the wrangler-injected name). For the version, either use the compatibility date if reachable at runtime or delete the TODO with a note saying workerd exposes nothing usable.

[linear-code]

JS-3575