Expand media, agents, applications, and messaging module APIs on main.

Adds snapshot(), batch helpers, and clearAll aliases across media-streaming (20), agents-workflows, applications-collab/economy, messaging pubsub/streams/gossip.

Co-authored-by: Cursor <[email protected]>

messaging-streams/hyper-p2p-stream-tee/index.js

@@ -91,6 +91,10 @@ class HyperP2PStreamTee extends EventEmitter {
     return n
   }
 
+  snapshot () {
+    return { branches: this._branches.size }
+  }
+
   getStats () {
     return { ...this._stats, branchCount: this._branches.size, protocol: PROTOCOL }
   }