refactor(core): migrate to Bun and converge acquisition policies and Agent boundaries

apps/server/test/sources-identity/cloudflare.test.ts

@@ -118,7 +118,7 @@ describe.skipIf(!up)("CF-2 Cloudflare 级联", () => {
     }
     cf.passed++;
     return globalThis.fetch(input, init);
-  }) as typeof fetch;
+  }) as (input: RequestInfo | URL, init?: RequestInit) => Promise<Response>;
 
   const site = () => h.db.selectFrom("site").selectAll().where("id", "=", siteId).executeTakeFirstOrThrow();
   const account = () =>