fix: add migrations for stored procedure and privacy field in playlists

Migrations/00000000000000_StoredProcedure.cs

@@ -0,0 +1,32 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace Shadow.Migrations;
+public partial class _00000000000000_StoredProcedure : Migration
+{
+	protected override void Up(MigrationBuilder migrationBuilder)
+	{
+		migrationBuilder.Sql("""
+
+			CREATE OR REPLACE PROCEDURE song_cleanup()
+			LANGUAGE plpgsql
+			AS $$
+			BEGIN
+				DELETE FROM "Songs"
+				WHERE "State" = 0;
+			
+				COMMIT;
+			END;
+			$$;
+			
+			""");
+	}
+
+	protected override void Down(MigrationBuilder migrationBuilder)
+	{
+		migrationBuilder.Sql("""
+			DROP PROCEDURE IF EXISTS song_cleanup();
+			""");
+	}
+}
+