feat: add migration to move old files to xdg directory

+ add db column for migration version
+ handle pre-init migrations
+ handle post-init migration

app/setup/__init__.py

@@ -3,14 +3,19 @@ Contains the functions to prepare the server for use.
 """
 import os
 import shutil
+import time
 from configparser import ConfigParser
 
 from app import settings
 from app.db.sqlite import create_connection, create_tables, queries
 from app.db.store import Store
+from app.migrations import apply_migrations, set_postinit_migration_versions
+from app.migrations._preinit import (
+    run_preinit_migrations,
+    set_preinit_migration_versions,
+)
 from app.settings import APP_DB_PATH, USERDATA_DB_PATH
 from app.utils import get_home_res_path
-from app.migrations import apply_migrations
 
 config = ConfigParser()
 
@@ -102,6 +107,7 @@ def setup_sqlite():
     """
     # if os.path.exists(DB_PATH):
     #     os.remove(DB_PATH)
+    run_preinit_migrations()
 
     app_db_conn = create_connection(APP_DB_PATH)
     playlist_db_conn = create_connection(USERDATA_DB_PATH)
@@ -109,10 +115,15 @@ def setup_sqlite():
     create_tables(app_db_conn, queries.CREATE_APPDB_TABLES)
     create_tables(playlist_db_conn, queries.CREATE_USERDATA_TABLES)
 
+    create_tables(app_db_conn, queries.CREATE_MIGRATIONS_TABLE)
+    create_tables(playlist_db_conn, queries.CREATE_MIGRATIONS_TABLE)
+
     app_db_conn.close()
     playlist_db_conn.close()
 
     apply_migrations()
+    set_preinit_migration_versions()
+    set_postinit_migration_versions()
 
     Store.load_all_tracks()
     Store.process_folders()