Use more unique logger and remove redundant NOT NULL

maubot/standalone/__main__.py

@@ -123,7 +123,7 @@ db = Database.create(
     config["database"],
     db_args=config.get("database_opts", {}),
     ignore_foreign_tables=True,
-    log=logging.getLogger("maubot.db"),
+    log=logging.getLogger("maubot.db.standalone.upgrade"),
     upgrade_table=upgrade_table,
 )
 

maubot/standalone/database.py

@@ -32,10 +32,9 @@ upgrade_table = UpgradeTable(
 async def upgrade_v1(conn: Connection) -> None:
     await conn.execute(
         """CREATE TABLE IF NOT EXISTS standalone_next_batch (
-            user_id    TEXT NOT NULL,
+            user_id    TEXT PRIMARY KEY,
             next_batch TEXT,
-            filter_id  TEXT,
-            PRIMARY KEY (user_id)
+            filter_id  TEXT
         )"""
     )