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/moderation/cfh/page.tsx

@@ -1,6 +1,5 @@
 import { redirect } from "next/navigation";
 import { getTranslations } from "next-intl/server";
-import type { Prisma } from "@/generated/prisma/client";
 import { calcPagination, parseListParams } from "@/lib/admin-helpers";
 import { formatDate } from "@/lib/format-date";
 import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";
@@ -24,7 +23,7 @@ export default async function CfhListPage({
 	const stateFilter =
 		stateRaw !== undefined && stateRaw !== "" ? Number(stateRaw) : -1;
 
-	const conditions: Prisma.SupportTicketsWhereInput[] = [];
+	const conditions: any[] = [];
 	if (stateFilter >= 0) {
 		conditions.push({ state: stateFilter });
 	}
@@ -59,7 +58,7 @@ export default async function CfhListPage({
 		});
 	}
 
-	const where: Prisma.SupportTicketsWhereInput =
+	const where: any =
 		conditions.length === 0
 			? {}
 			: conditions.length === 1
@@ -68,7 +67,7 @@ export default async function CfhListPage({
 
 	const SORT_MAP: Record<
 		string,
-		Prisma.SupportTicketsOrderByWithRelationInput
+		any
 	> = {
 		id: { id: "desc" },
 		issue: { issue: "asc" },
@@ -82,7 +81,7 @@ export default async function CfhListPage({
 	const orderField = Object.keys(baseOrder)[0] as keyof typeof baseOrder;
 	const orderBy = {
 		[orderField]: parsed.order,
-	} as Prisma.SupportTicketsOrderByWithRelationInput;
+	} as any;
 
 	const total = await prisma.supportTickets.count({ where }).catch(() => 0);
 	const pagination = calcPagination(total, parsed.page, parsed.perPage);