chore(db): finish Prisma cutover to Drizzle Kit tooling

Move CMS SQL to drizzle/migrations, drop prisma packages/schema, wire drizzle-kit scripts, and regenerate schema names from src/db/schema.ts.

Co-authored-by: Cursor <[email protected]>

src/lib/admin/acl-migration-contract.test.ts

@@ -4,7 +4,7 @@ import { describe, expect, it } from "vitest";
 import { PERMS } from "@/lib/permission-slugs";
 
 describe("production ACL migration", () => {
-	const migrationsDir = resolve(process.cwd(), "prisma/migrations");
+	const migrationsDir = resolve(process.cwd(), "drizzle/migrations");
 	const allSql = readdirSync(migrationsDir)
 		.filter((name) => name.endsWith(".sql"))
 		.map((name) => readFileSync(resolve(migrationsDir, name), "utf8"))