feat: add async_mode param to AsyncERClient.delete_source

erclient/client.py

@@ -1424,16 +1424,19 @@ async def delete_subject(self, subject_id):
         self.logger.debug(f'Deleting subject {subject_id}')
         return await self._delete(f'subject/{subject_id}/')
 
-    async def delete_source(self, source_id):
+    async def delete_source(self, source_id, async_mode: bool = False):
         """
         Delete a source from EarthRanger.
 
         WARNING: Irreversible — deleted sources lose all linked observation history.
 
         :param source_id: The source UUID
+        :param async_mode: If True, passes ?async=true so ER processes the deletion
+            asynchronously. Defaults to False (synchronous).
         """
         self.logger.debug(f'Deleting source {source_id}')
-        return await self._delete(f'source/{source_id}/')
+        params = {"async": "true"} if async_mode else None
+        return await self._delete(f'source/{source_id}/', params=params)
 
     async def add_subjects_to_subjectgroup(self, group_id, subjects):
         """

erclient/version.py

@@ -1 +1 @@
-__version__ = '1.14.0'
+__version__ = '1.15.0'