feat: migrate to Fedify 2.0 with debug dashboard and modular imports

- Upgrade @fedify/fedify, @fedify/redis to ^2.0.0
- Add @fedify/debugger ^2.0.0 for live federation traffic dashboard
- Move all vocab type imports to @fedify/fedify/vocab (13 files)
- Move crypto imports (exportJwk, importJwk, generateCryptoKeyPair) to @fedify/fedify/sig
- Replace removed importSpki() with local Web Crypto API helper
- Add KvStore.list() async generator required by Fedify 2.0
- Add setOutboxPermanentFailureHandler for delivery failure logging
- Add debugDashboard/debugPassword config options
- Skip manual LogTape configure when debugger auto-configures it
- Fix Express-Fedify bridge to reconstruct body from req.body when
  Express body parser has already consumed the stream (fixes debug
  dashboard login TypeError)
- Add response.bodyUsed safety check in sendFedifyResponse
- Remove @fedify/express dependency (custom bridge handles sub-path mounting)

lib/controllers/compose.js

@@ -188,7 +188,7 @@ export function submitComposeController(mountPath, plugin) {
           });
         }
 
-        const { Create, Note } = await import("@fedify/fedify");
+        const { Create, Note } = await import("@fedify/fedify/vocab");
         const handle = plugin.options.actor.handle;
         const ctx = plugin._federation.createContext(
           new URL(plugin._publicationUrl),