refactor: move db_maintenance table creation to the correct migration step

- Reintroduced the creation of the db_maintenance table in the appropriate section of the database setup process.
- Ensured that the table is created after the version migration to maintain database integrity.

comet/core/database.py

@@ -30,14 +30,6 @@ async def setup_database():
             """
         )
 
-        await database.execute(
-            """
-                CREATE TABLE IF NOT EXISTS db_maintenance (
-                    id INTEGER PRIMARY KEY CHECK (id = 1),
-                    last_startup_cleanup REAL
-                )
-            """
-        )
 
         current_version = await database.fetch_val(
             """
@@ -86,6 +78,15 @@ async def setup_database():
                 "COMET", f"Database: Migration to version {DATABASE_VERSION} completed"
             )
 
+        await database.execute(
+            """
+                CREATE TABLE IF NOT EXISTS db_maintenance (
+                    id INTEGER PRIMARY KEY CHECK (id = 1),
+                    last_startup_cleanup REAL
+                )
+            """
+        )
+
         await database.execute(
             """
                 CREATE TABLE IF NOT EXISTS ongoing_searches (