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/services/upload-import.ts

@@ -38,7 +38,7 @@ export interface UploadParams {
 
 const MIGRATIONS_DIR = path.resolve(
 	/*turbopackIgnore: true*/ process.cwd(),
-	"prisma/migrations",
+	"drizzle/migrations",
 );
 
 let itemsBaseIdAllocChain: Promise<unknown> = Promise.resolve();