feat(pages): 支持 GitHub Release 部署源

增加 latest/tag 手动检查与同步、ETag 与限流退避、资源替换确认，以及对应的前端来源管理和部署来源展示。

frontend/lib/services/openflare/index.ts

@@ -109,7 +109,11 @@ export type {
   OriginMutationPayload,
   PagesDeployment,
   PagesDeploymentFile,
+  PagesGitHubLatestSourceUpdatePayload,
+  PagesGitHubReleaseSelector,
   PagesGitHubReleaseSource,
+  PagesGitHubSourceUpdatePayload,
+  PagesGitHubTagSourceUpdatePayload,
   PagesManualSource,
   PagesProject,
   PagesProjectPayload,
@@ -121,6 +125,7 @@ export type {
   PagesSourceActionReceipt,
   PagesSourceRevision,
   PagesSourceStatus,
+  PagesSourceUpdatePayload,
   PagesSourceUpdateResult,
   AcmeAccountItem,
   DnsAccountItem,