Add lifecycle browser authoring and durable review handoff retrieval

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a10780-6d41-7952-9718-dfbc1f41236f

informed_decision/lifecycle_service.py

@@ -182,6 +182,14 @@ class LifecycleService:
         current()
         return result
 
+    def review_handoff(self, caller, memo_id, version):
+        """Retrieve the exact retained event; this never resubmits an approval."""
+        from .lifecycle_review import handoff
+        current, _ = self._authorize(caller, memo_id, "events", {"version": version})
+        result = handoff(self.repository, caller.attribution.tenant, memo_id, version)
+        current()
+        return result
+
     def search(self, caller, *, query="", cursor=None):
         self._caller(caller)
         if not isinstance(query, str) or len(query) > 200: