Add config option to change number of dialogs to handle in startup sync

mautrix_telegram/config.py

@@ -203,6 +203,7 @@ class Config(DictWithRecursion):
         copy("bridge.max_initial_member_sync")
         copy("bridge.sync_channel_members")
         copy("bridge.startup_sync")
+        copy("bridge.sync_dialog_limit")
         copy("bridge.sync_matrix_state")
         copy("bridge.max_telegram_delete")
         copy("bridge.allow_matrix_login")

mautrix_telegram/user.py

@@ -289,7 +289,7 @@ class User(AbstractUser):
 
     async def sync_dialogs(self, synchronous_create: bool = False) -> None:
         creators = []
-        for entity in await self.get_dialogs(limit=30):
+        for entity in await self.get_dialogs(limit=config["bridge.sync_dialog_limit"] or None):
             portal = po.Portal.get_by_entity(entity)
             self.portals[portal.tgid_full] = portal
             creators.append(