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/translations/emulator/page.tsx

@@ -3,7 +3,6 @@ import Link from "next/link";
 import { getTranslations } from "next-intl/server";
 import { EmulatorSettingsForm } from "@/components/admin/emulator-settings-form";
 import { Button } from "@/components/ui/button";
-import type { Prisma } from "@/generated/prisma/client";
 import { calcPagination } from "@/lib/admin-helpers";
 import { prisma } from "@/lib/prisma";
 
@@ -30,21 +29,21 @@ export default async function EmulatorTranslationsPage({
 	const perPage = Math.min(Math.max(parseInt(sp.perPage || "50", 10), 10), 200);
 	const page = Math.max(parseInt(sp.page || "1", 10), 1);
 
-	const patternFilters: Prisma.EmulatorSettingsWhereInput[] =
+	const patternFilters: any[] =
 		TRANSLATION_KEY_PATTERNS.map((p) => ({
 			key: { contains: p.replace(/%/g, "") },
 		}));
 
-	const baseFilter: Prisma.EmulatorSettingsWhereInput = { OR: patternFilters };
+	const baseFilter: any = { OR: patternFilters };
 
-	const conditions: Prisma.EmulatorSettingsWhereInput[] = [baseFilter];
+	const conditions: any[] = [baseFilter];
 	if (group) conditions.push({ key: { startsWith: `${group}.` } });
 	if (search) {
 		conditions.push({
 			OR: [{ key: { contains: search } }, { value: { contains: search } }],
 		});
 	}
-	const where: Prisma.EmulatorSettingsWhereInput = { AND: conditions };
+	const where: any = { AND: conditions };
 
 	const [settings, total, allKeys] = await Promise.all([
 		prisma.emulatorSettings.findMany({