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

packages/adapters/src/rss/fetch.ts

@@ -7,7 +7,7 @@ import { redactText, redactUrl } from "./redact.ts";
 import { FeedError, type FeedFetchResult, type FeedFetchState } from "./types.ts";
 
 export interface RssFetcherOptions {
-  fetch?: typeof globalThis.fetch;
+  fetch?: (input: RequestInfo | URL, init?: RequestInit) => Promise<Response>;
   now?: () => Date;
   /** 单次请求超时,默认 30s(MP `timeout or 30`) */
   timeoutMs?: number;
@@ -31,7 +31,7 @@ export interface FetchFeedOptions {
   /** 本次请求的 UA(覆盖 RssFetcherOptions.userAgent;BR-4 按站点账号取) */
   userAgent?: string;
   /** 本次请求用的 fetch(覆盖 RssFetcherOptions.fetch;BR-4 站点代理 = 与站点其它请求同一出口) */
-  fetch?: typeof globalThis.fetch;
+  fetch?: (input: RequestInfo | URL, init?: RequestInit) => Promise<Response>;
 }
 
 export function initialFeedState(): FeedFetchState {