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/events/page.tsx

@@ -1,7 +1,9 @@
+import { count, desc, eq, 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, WebsiteEvent, WebsiteEventType } from "@/lib/db";
 import { PERMS } from "@/lib/permissions";
 import { EventsTable } from "./events-table";
 
@@ -16,29 +18,44 @@ export default async function EventsPage({
 	const result = await fetchAdminList(
 		{
 			permission: PERMS.EVENTS_VIEW,
-			model: "websiteEvent",
-			searchFields: ["title"],
-			defaultSort: { startsAt: "desc" },
-			include: { type: { select: { name: true, color: true } } },
-			mapRow: (e: {
-				id: number;
-				title: string;
-				type: { name: string; color: string };
-				startsAt: Date;
-				endsAt: Date | null;
-				status: string;
-				hostUserId: number;
-				_count?: { registrations: number };
-			}) => ({
-				id: e.id,
-				title: e.title,
-				typeName: e.type.name,
-				typeColor: e.type.color,
-				startsAt: e.startsAt,
-				endsAt: e.endsAt,
-				status: e.status,
-				hostUserId: e.hostUserId,
-			}),
+			fetch: async ({ search, page, perPage }) => {
+				const [rows, totals] = await Promise.all([
+					db
+						.select({
+							id: WebsiteEvent.id,
+							title: WebsiteEvent.title,
+							startsAt: WebsiteEvent.startsAt,
+							endsAt: WebsiteEvent.endsAt,
+							status: WebsiteEvent.status,
+							hostUserId: WebsiteEvent.hostUserId,
+							typeName: WebsiteEventType.name,
+							typeColor: WebsiteEventType.color,
+						})
+						.from(WebsiteEvent)
+						.leftJoin(
+							WebsiteEventType,
+							eq(WebsiteEvent.typeId, WebsiteEventType.id),
+						)
+						.where(search ? like(WebsiteEvent.title, `%${search}%`) : undefined)
+						.orderBy(desc(WebsiteEvent.startsAt))
+						.limit(perPage)
+						.offset((page - 1) * perPage),
+					db.select({ total: count() }).from(WebsiteEvent),
+				]);
+				return {
+					rows: rows.map((e) => ({
+						id: e.id,
+						title: e.title,
+						typeName: e.typeName ?? "",
+						typeColor: e.typeColor ?? "",
+						startsAt: e.startsAt,
+						endsAt: e.endsAt,
+						status: e.status,
+						hostUserId: e.hostUserId,
+					})),
+					total: totals[0]?.total ?? 0,
+				};
+			},
 		},
 		paramsPromise,
 		searchParams,