feat(cache): implement a simple caching mechanism with TTL and prefix invalidation

refactor(expenses): integrate caching for periodic expenses and related operations
refactor(quotes): add caching for quotes retrieval and history endpoints

apps/backend/src/modules/expenses/handlers/importExpenses.ts

@@ -1,5 +1,6 @@
 import type { Context } from "hono";
 import { prisma } from "../../../lib/prisma";
+import { cache } from "../../../lib/cache";
 import { logger } from "../../../lib/logger";
 import { PaymentStatus } from "../../../generated/prisma/client";
 
@@ -113,6 +114,8 @@ export async function importExpensesHandler(c: Context) {
     }
   }
 
+  cache.invalidateByPrefix("expenses:");
+
   return c.json({
     imported,
     skipped,