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

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

@@ -64,7 +64,7 @@ const mockFetch = (async (input: string | URL | Request) => {
   if (url.href === EVIL)
     return new Response("<html><title>x</title><body>x</body></html>", { headers: { "content-type": "text/html" } });
   return new Response("not found", { status: 404 });
-}) as typeof fetch;
+}) as (input: RequestInfo | URL, init?: RequestInit) => Promise<Response>;
 const resolveHost = async () => ["93.184.216.34"];
 
 /** fake 模型:照网页给值,简介是改写过的(不是原文),海报给一个网页里没有的地址(应被丢弃) */
@@ -360,7 +360,7 @@ describe.skipIf(!pg)("META-1 元数据补全", () => {
         return new Response("User-agent: *\nDisallow: /series/\n", { headers: { "content-type": "text/plain" } });
       if (u.hostname === "robots-b.example.com") return new Response("err", { status: 503 });
       return new Response("nf", { status: 404 });
-    }) as typeof fetch;
+    }) as (input: RequestInfo | URL, init?: RequestInit) => Promise<Response>;
     const o = { fetch: f, resolveHost };
     expect(await robotsAllowedFor(h.ctx, "https://robots-a.example.com/series/1", o)).toBe(false);
     expect(await robotsAllowedFor(h.ctx, "https://robots-a.example.com/detail?id=1", o)).toBe(true);