refactor: replace Prisma ORM runtime with Drizzle ORM facade

- Replace Prisma client runtime with Drizzle ORM (zero Prisma engine/query engine in production)
- Add Prisma-compatible facade (@/lib/prisma-facade.ts) backed by Drizzle for backwards compatibility
- Runtime queries route through Drizzle ORM; @prisma/client is now devDependency (types only)
- Remove @prisma/adapter-mariadb dependency; delete prisma-pool.ts and types/prisma.ts
- New Drizzle schema layer: src/db/schema.ts (176 tables) and src/lib/db.ts (connection)
- Update README documenting the dual-layer ORM architecture
- Restore src/generated/ gitignore (build artifact for local type generation)
- 0 TypeScript errors, 583 tests passing

The facade intentionally uses `any` types to match the Prisma Client API surface,
allowing existing code to run unmodified while routing queries through Drizzle at runtime.

src/actions/catalog.ts

@@ -1,7 +1,6 @@
 "use server";
 
 import { revalidatePath } from "next/cache";
-import type { Prisma } from "@/generated/prisma/client";
 import { requirePermission } from "@/lib/admin/guard";
 import { PERMS } from "@/lib/permissions";
 import { prisma } from "@/lib/prisma";
@@ -57,7 +56,7 @@ export async function updateCatalogPage({
 	}
 	await prisma.catalogPages.update({
 		where: { id },
-		data: data as Prisma.CatalogPagesUpdateInput,
+		data: data as any,
 	});
 	await rcon.updateCatalog();
 	await logStaffActivity({