feat(injects,conversations,scheduler,gateway_tools,api): wake priority, master and parent aliases, scheduled injects start a turn

src/beaver_gateway/storage/models.py

@@ -147,7 +147,7 @@ class ConversationBinding(SQLModel, table=True):
 
 
 class InjectQueueItem(SQLModel, table=True):
-    """Persisted per-conversation queue (§3.4), priorities ``urgent > user > normal``.
+    """Persisted per-conversation queue (§3.4), ``urgent > user > wake > normal``.
 
     ``status`` walks ``queued -> running -> done``; a row still ``running``
     at startup was cut by a restart and becomes ``interrupted`` - it is