feat(scheduler): job dedupe flag for webhooks that must not collapse

src/beaver_gateway/core/scheduler.py

@@ -58,6 +58,7 @@ class Job:
     webhook: bool = False
     events: tuple[str, ...] = ()
     critical: bool = True
+    dedupe: bool = True
 
     @property
     def entrypoint(self) -> str:
@@ -297,8 +298,8 @@ class Scheduler:
         ids = await self._queries.enqueue(
             job.entrypoint,
             _encode({**payload, "trigger": "webhook"}),
-            dedupe_key=f"hook:{name}",
-            on_conflict="skip",
+            dedupe_key=f"hook:{name}" if job.dedupe else None,
+            on_conflict="skip" if job.dedupe else "raise",
         )
         return int(ids[0]) if ids and ids[0] is not None else None