refactor(api): enhance donation creation with rate limiting, Zod validation, and secure logging

- Add rate limiting to prevent abuse on /api/donations/create endpoint
- Replace manual input validation with Zod schema for better error handling and type safety
- Switch from console.log to secureLogger to comply with LGPD and avoid exposing sensitive data
- Remove sensitive request body logging in AbacatePay client for improved security

app/api/donations/verify/route.ts

@@ -1,8 +1,20 @@
 import { NextRequest, NextResponse } from "next/server";
 import { abacatePay } from "@/lib/abacatepay";
+import {
+  checkRateLimit,
+  getClientIP,
+  createRateLimitResponse,
+} from "@/lib/rate-limiter";
 
 export async function GET(request: NextRequest) {
   try {
+    // Rate limiting
+    const ip = getClientIP(request);
+    const rateLimit = checkRateLimit(ip, "/api/donations/verify");
+
+    if (!rateLimit.allowed) {
+      return createRateLimitResponse(rateLimit.resetAt);
+    }
     const { searchParams } = new URL(request.url);
     const billingId = searchParams.get("billingId");