feat(network,routing): manually expand stack and advanced routing modules

- multipath-fanout: progress, cancelPending, pruneStale
- protocol-handshake: negotiate, clearOffers
- secret-stream-pair: createAndOpen, destroyActive
- load-spread: pickTop, incrementLoad, removePeer, totalLoad
- geo-hint-router: routeTopN, peersInRadius, listPeers

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

network-stack/hyper-p2p-multipath-fanout/index.js

@@ -65,6 +65,28 @@ class HyperP2PMultipathFanout extends EventEmitter {
     return b4a.concat(parts)
   }
 
+  progress (msgId) {
+    const p = this._pending.get(msgId)
+    if (!p) return null
+    return { received: p.shards.size, total: p.total, ratio: p.shards.size / p.total }
+  }
+
+  cancelPending (msgId) {
+    return this._pending.delete(msgId)
+  }
+
+  pruneStale (maxAgeMs = 60000) {
+    const cutoff = Date.now() - maxAgeMs
+    let n = 0
+    for (const [id, p] of this._pending) {
+      if ((p.createdAt || 0) < cutoff) {
+        this._pending.delete(id)
+        n++
+      }
+    }
+    return n
+  }
+
   getStats () {
     return { ...this._stats, pending: this._pending.size, protocol: PROTOCOL }
   }