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/app/admin/polls/page.tsx

@@ -1,7 +1,9 @@
+import { count, desc, like } from "drizzle-orm";
 import Link from "next/link";
 import { getTranslations } from "next-intl/server";
 import { Button } from "@/components/ui/button";
 import { fetchAdminList } from "@/lib/admin-list";
+import { db, WebsitePoll } from "@/lib/db";
 import { PERMS } from "@/lib/permissions";
 import { PollsTable } from "./polls-table";
 
@@ -16,28 +18,31 @@ export default async function PollsPage({
 	const result = await fetchAdminList(
 		{
 			permission: PERMS.POLLS_VIEW,
-			model: "websitePoll",
-			searchFields: ["title"],
-			defaultSort: { createdAt: "desc" },
-			mapRow: (p: {
-				id: number;
-				title: string;
-				status: string;
-				showResults: number;
-				multipleChoice: number;
-				startsAt: Date | null;
-				endsAt: Date | null;
-				createdAt: Date;
-			}) => ({
-				id: p.id,
-				title: p.title,
-				status: p.status,
-				showResults: p.showResults,
-				multipleChoice: p.multipleChoice,
-				startsAt: p.startsAt,
-				endsAt: p.endsAt,
-				createdAt: p.createdAt,
-			}),
+			fetch: async ({ search, page, perPage }) => {
+				const where = search
+					? like(WebsitePoll.title, `%${search}%`)
+					: undefined;
+				const [rows, totals] = await Promise.all([
+					db
+						.select({
+							id: WebsitePoll.id,
+							title: WebsitePoll.title,
+							status: WebsitePoll.status,
+							showResults: WebsitePoll.showResults,
+							multipleChoice: WebsitePoll.multipleChoice,
+							startsAt: WebsitePoll.startsAt,
+							endsAt: WebsitePoll.endsAt,
+							createdAt: WebsitePoll.createdAt,
+						})
+						.from(WebsitePoll)
+						.where(where)
+						.orderBy(desc(WebsitePoll.createdAt))
+						.limit(perPage)
+						.offset((page - 1) * perPage),
+					db.select({ total: count() }).from(WebsitePoll).where(where),
+				]);
+				return { rows, total: totals[0]?.total ?? 0 };
+			},
 		},
 		paramsPromise,
 		searchParams,