Expand pear, media, experimental, state, and messaging modules

Add manual API helpers across categories: pear runtime/embed/runner/spawn,
preflight cancel, update gossip history, headless UI pipe helpers, media
origin weights and latency paths, experimental void/tension/time-capsule,
CRDT conflict-set and grow-only-set, job dispatcher peek, trust graph decay,
session rotateAll, topic channel batch unsubscribe, fulltext searchOr, FEC
batch encode, marketplace cheapest listing, and noise session closeAll.

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

pear-platform/hyper-bare-headless-ui/index.js

@@ -87,6 +87,16 @@ class HyperBareHeadlessUi extends EventEmitter {
     this.emit('teardown')
   }
 
+  pipeChannels () {
+    return this._pipe ? [...this._pipe.channels] : []
+  }
+
+  closePipe () {
+    if (!this._pipe) return false
+    this._pipe.open = false
+    return true
+  }
+
   snapshot () {
     return {
       uiEnabled: this.uiEnabled,