feat(sources,organize): site agent capabilities and organize.minSizeBytes setting (W10-pre2)

- site.list / site.health_check / site.refresh_login / site.user_data capabilities
  over the W9-A site center services; outputs whitelisted (no secret refs,
  cookies, passwords, login names); execute kinds need automation grant.
  IDs use snake_case (CapabilityId regex); registry count 17 -> 21.
- settings.organize.minSizeBytes (default 50 MiB); file-manager identify /
  organize and planImport take request > setting > port default.
- tests and runbook notes (sites, files).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/server/test/e2e/harness.ts

@@ -235,6 +235,8 @@ export async function createE2E(name: string, opts: E2EOptions = {}): Promise<E2
   await e.settings({
     metadata: { tmdbApiKey: TMDB_KEY, tmdbBaseUrl: `${tmdb.url}/3` },
     retention: { seedRetentionDays: 0 },
+    // 整理最小体积与模块端口的 minVideoBytes 一致(测试文件 ≥ 100 KB)
+    organize: { minSizeBytes: 100_000 },
   });
   if (opts.worker !== false) await e.startWorker();
   return e;