feat(subscriptions): implement subscription quota enforcement

- Apply QuotaGuard + @RequireQuota to listing creation and analytics endpoints
- Add QuotaExceeded domain event emitted when quota is exceeded
- Create ListingCreatedUsageHandler to auto-meter usage on listing creation
- Create QuotaExceededListener to send email notifications on quota exceeded
- Add maxAnalyticsQueries and maxMediaUploads fields to Plan model
- Add quota.exceeded email notification template
- Define quota limits per plan tier in seed data
- Add 15 unit tests covering guard, event handler, listener, and event

Co-Authored-By: Paperclip <noreply@paperclip.ing>

scripts/seed-plans.ts

@@ -21,6 +21,8 @@ export const PLANS = [
     priceYearlyVND: BigInt(0),
     maxListings: 3,
     maxSavedSearches: 5,
+    maxAnalyticsQueries: 0,
+    maxMediaUploads: 5,
     features: {
       basicSearch: true,
       listingPost: true,
@@ -38,6 +40,8 @@ export const PLANS = [
     priceYearlyVND: BigInt(4_990_000),
     maxListings: 50,
     maxSavedSearches: 30,
+    maxAnalyticsQueries: 100,
+    maxMediaUploads: 150,
     features: {
       basicSearch: true,
       listingPost: true,
@@ -57,6 +61,8 @@ export const PLANS = [
     priceYearlyVND: BigInt(9_990_000),
     maxListings: 20,
     maxSavedSearches: 100,
+    maxAnalyticsQueries: 500,
+    maxMediaUploads: 60,
     features: {
       basicSearch: true,
       listingPost: true,
@@ -77,6 +83,8 @@ export const PLANS = [
     priceYearlyVND: BigInt(49_900_000),
     maxListings: null,
     maxSavedSearches: null,
+    maxAnalyticsQueries: null,
+    maxMediaUploads: null,
     features: {
       basicSearch: true,
       listingPost: true,
@@ -109,6 +117,8 @@ async function seedPlans() {
         priceYearlyVND: plan.priceYearlyVND,
         maxListings: plan.maxListings,
         maxSavedSearches: plan.maxSavedSearches,
+        maxAnalyticsQueries: plan.maxAnalyticsQueries,
+        maxMediaUploads: plan.maxMediaUploads,
         features: plan.features,
       },
       create: plan,