fix: migration code not working

- read database config from config file
- rename migration file to expected file name format

apps/backend/internal/database/migrate.go

@@ -1,17 +1,28 @@
 package database
 
 import (
+	"context"
 	"embed"
 
+	"github.com/uptrace/bun"
 	"github.com/uptrace/bun/migrate"
 )
 
 //go:embed migrations/*.sql
 var sqlMigrations embed.FS
 
-// RunMigrations discovers and runs all migrations in the migrations directory.
-// Currently, the migrations directory is in internal/db/migrations.
-func RunMigrations() error {
-	m := migrate.NewMigrations()
-	return m.Discover(sqlMigrations)
+// RunMigrations discovers and runs all migrations against the database.
+func RunMigrations(ctx context.Context, db *bun.DB) error {
+	migrations := migrate.NewMigrations()
+	if err := migrations.Discover(sqlMigrations); err != nil {
+		return err
+	}
+
+	migrator := migrate.NewMigrator(db, migrations)
+	if err := migrator.Init(ctx); err != nil {
+		return err
+	}
+
+	_, err := migrator.Migrate(ctx)
+	return err
 }