REFACTORED - Replace Prisma with Drizzle ORM

- Add lib/db (schema, postgres.js client, enums, seed, migrations) on Drizzle
- Rewrite all lib and admin action queries from Prisma to Drizzle
- Keep existing table/column names so no data migration is needed
- Preserve signed-cookie admin auth unchanged
- Map unique-violation handling from Prisma P2002 to SQLSTATE 23505
- Swap deps, scripts, Makefile, and Dockerfile from Prisma to Drizzle

lib/db/index.ts

@@ -0,0 +1,24 @@
+import { drizzle } from "drizzle-orm/postgres-js";
+import postgres from "postgres";
+
+import * as schema from "./schema";
+
+const rawConnectionString =
+  process.env.DATABASE_URL ?? "postgresql://postgres:postgres@localhost:5432/moh_sass";
+
+// Prisma allowed a `?schema=public` query param that postgres.js does not
+// understand — strip any unknown query string; `public` is the default schema.
+const connectionString = rawConnectionString.split("?")[0];
+
+const globalForDb = globalThis as unknown as {
+  pgClient: ReturnType<typeof postgres> | undefined;
+};
+
+const client = globalForDb.pgClient ?? postgres(connectionString, { max: 10 });
+
+if (process.env.NODE_ENV !== "production") {
+  globalForDb.pgClient = client;
+}
+
+export const db = drizzle(client, { schema });
+export { schema };