create app schema if not exists without relying on init.sql

Controllers/MigrationController.cs

@@ -34,6 +34,7 @@ namespace CarCareTracker.Controllers
         {
             var cmds = new List<string>
             {
+                "CREATE SCHEMA IF NOT EXISTS app",
                 "CREATE TABLE IF NOT EXISTS app.vehicles (id INT GENERATED BY DEFAULT AS IDENTITY primary key, data jsonb not null)",
                 "CREATE TABLE IF NOT EXISTS app.collisionrecords (id INT GENERATED BY DEFAULT AS IDENTITY primary key, vehicleId INT not null, data jsonb not null)",
                 "CREATE TABLE IF NOT EXISTS app.upgraderecords (id INT GENERATED BY DEFAULT AS IDENTITY primary key, vehicleId INT not null, data jsonb not null)",