Add PostgreSQL support via pg and node-postgres drizzle adapter

drizzle.config.ts

@@ -6,12 +6,15 @@ import { defineConfig } from "drizzle-kit";
 // This DB is shared with the Arcturus emulator — NEVER run `drizzle-kit migrate`
 // or `push` against it. CMS DDL stays in drizzle/migrations/*.sql applied by
 // `pnpm db:migrate`. Use `pnpm db:generate` only for draft SQL under drizzle/drafts/.
+const dbUrl = process.env.DATABASE_URL ?? "";
+const isPostgres = dbUrl.startsWith("postgres://") || dbUrl.startsWith("postgresql://");
+
 export default defineConfig({
-	dialect: "mysql",
+	dialect: isPostgres ? "postgresql" : "mysql",
 	schema: "./src/db/schema.ts",
 	out: "./drizzle/drafts",
 	dbCredentials: {
-		url: process.env.DATABASE_URL ?? "",
+		url: dbUrl,
 	},
 	strict: true,
 	verbose: true,