db improvments

api/web_routes.py

@@ -204,7 +204,11 @@ async def get_series_sources(dependencies: dict):
             ORDER BY source
         """)
         
-        sources = [row[0] for row in cursor.fetchall()]
+        rows = cursor.fetchall()
+        if db.db_type == "postgresql":
+            sources = [list(row.values())[0] for row in rows]
+        else:
+            sources = [row[0] for row in rows]
         return {"sources": sources}