fix(router): clear failed reliable send retries (#11267)

* fix(router): clear failed reliable send retries

* test(router): cover failed interface enqueue

* fix(router): retain retries after duty cycle limits

src/mesh/ReliableRouter.cpp

@@ -16,6 +16,9 @@
  */
 ErrorCode ReliableRouter::send(meshtastic_MeshPacket *p)
 {
+    const GlobalPacketId key(p);
+    const bool retransmitting = p->want_ack;
+
     if (p->want_ack) {
         DEBUG_HEAP_BEFORE;
         auto copy = packetPool.allocCopy(*p);
@@ -34,7 +37,12 @@ ErrorCode ReliableRouter::send(meshtastic_MeshPacket *p)
         }
     }
 
-    return isBroadcast(p->to) ? FloodingRouter::send(p) : NextHopRouter::send(p);
+    ErrorCode result = isBroadcast(p->to) ? FloodingRouter::send(p) : NextHopRouter::send(p);
+    // Duty-cycle rejections may clear before the scheduled retry.
+    if (retransmitting && result != ERRNO_OK && result != meshtastic_Routing_Error_DUTY_CYCLE_LIMIT)
+        stopRetransmission(key);
+
+    return result;
 }
 
 bool ReliableRouter::shouldFilterReceived(const meshtastic_MeshPacket *p)
@@ -196,4 +204,4 @@ bool ReliableRouter::shouldSuccessAckWithWantAck(const meshtastic_MeshPacket *p)
     }
 
     return false;
-}
+}