fix(prompt-gate): pin duplicate prompt dispatches

Keep prompt reservations briefly after successful dispatch so rapid idle/message/error transitions cannot inject the same follow-up twice.

Route all production session prompt calls through the shared gate, restore skipped background resume state, release holds after abort/recovery paths, and preserve Ralph/ULW loop state when a dispatch is deferred.

Add regression coverage for session routing, static prompt route auditing, team-mode live messaging, model suggestion retries, call-omo-agent reuse, background parent wakes, runtime fallback, compaction recovery, Atlas, and Ralph/ULW loops.

src/shared/session-route.ts

@@ -56,7 +56,7 @@ export function promptAsyncInDirectory(
   const routedArgs = routeSessionPrompt(args, directory)
   const sessionID = routedArgs.path?.id
   if (!sessionID) {
-    return client.session.promptAsync(routedArgs)
+    return Promise.reject(new Error("session id is required for routed promptAsync"))
   }
 
   return promptAsyncAfterSessionIdle({
@@ -65,7 +65,6 @@ export function promptAsyncInDirectory(
     input: routedArgs,
     source: "session-route",
     settleMs: 0,
-    postDispatchHoldMs: 0,
   }).then((result) => {
     if (result.status === "failed") {
       throw result.error