Rename experimental config per suggestion

Author: AndrewFerr

synapse/config/experimental.py

@@ -567,8 +567,8 @@ def read_config(
         )
 
         # MSC4140: How many finalised delayed events to keep per user before deleting them.
-        self.msc4140_finalised_retention_limit = experimental.get(
-            "msc4140_finalised_retention_limit", 1000
+        self.msc4140_finalised_per_user_retention_limit = experimental.get(
+            "msc4140_finalised_per_user_retention_limit", 1000
         )
 
         # MSC4143: Matrix RTC Transport using Livekit Backend

synapse/handlers/delayed_events.py

@@ -334,7 +334,7 @@ async def _prune_finalised_events(self) -> None:
         await self._store.prune_finalised_delayed_events(
             self._get_current_ts(),
             self.hs.config.experimental.msc4140_finalised_retention_period,
-            self.hs.config.experimental.msc4140_finalised_retention_limit,
+            self.hs.config.experimental.msc4140_finalised_per_user_retention_limit,
         )
 
     async def add(
@@ -602,7 +602,7 @@ async def get_delayed_events_for_user(
                 delay_ids,
                 self._get_current_ts(),
                 self.hs.config.experimental.msc4140_finalised_retention_period,
-                self.hs.config.experimental.msc4140_finalised_retention_limit,
+                self.hs.config.experimental.msc4140_finalised_per_user_retention_limit,
             )
         return ret