add: markdown deletion

api/markdown.py

@@ -317,15 +317,21 @@ def delete_markdown(markdown_id):
 
                     session.delete(markdown_setting)
 
+            # Send webhook event before committing the transaction
+            # This ensures webhook handlers can still access related data
+            markdown_deleted.send(None, payload=md)
+            
             session.delete(markdown)
             session.commit()
             
-            markdown_deleted.send(None, payload=md)
             logger.info(f"Successfully deleted markdown {markdown_id} with cascade deletion")
             return jsonify(md), 200
             
         except Exception as e:
+            import traceback
             logger.error(f"Failed to delete markdown {markdown_id}: {e}")
+            logger.error(f"Exception type: {type(e).__name__}")
+            logger.error(f"Full traceback:\n{traceback.format_exc()}")
             errno = RequestContext.get_error_id()
             session.rollback()
             return jsonify({"error": f"delete failed - {errno}"}), 500