feat(server): clean up dirty data from legacy version (#15078)

#### PR Dependency Tree


* **PR #15078** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
  * Persist and replay incoming payment webhooks for reliability.
* Track provider-level subscriptions, payment events, and per-target
trial usage across providers.
  * Nightly replay job to reprocess stuck payment events.
* Shadow backfill mode and emit-suppression options to control
projection/backfill side effects.
  * Subscriptions now derived from entitlements + provider facts.

* **Bug Fixes**
* Improved error propagation, retry tracking, and safer owner-grant
projection handling.

* **Tests**
* Added webhook failure/replay, provider integration, entitlement
projection, and trial/checkout tests.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/data/migrations/1765600000000-backfill-entitlement-projection.ts

@@ -9,7 +9,7 @@ export class BackfillEntitlementProjection1765600000000 {
     const projection = ref.get(LegacyEntitlementProjectionService, {
       strict: false,
     });
-    await projection.backfillEntitlementsAndQuotaStates();
+    await projection.shadowBackfillEntitlementsAndQuotaStates();
 
     const quota = ref.get(QuotaStateService, { strict: false });
     const [users, workspaces] = await Promise.all([
@@ -18,9 +18,12 @@ export class BackfillEntitlementProjection1765600000000 {
     ]);
 
     const tasks = [
-      ...users.map(user => () => quota.reconcileUserQuotaState(user.id)),
+      ...users.map(
+        user => () => quota.reconcileUserQuotaState(user.id, { emit: false })
+      ),
       ...workspaces.map(
-        workspace => () => quota.reconcileWorkspaceQuotaState(workspace.id)
+        workspace => () =>
+          quota.reconcileWorkspaceQuotaState(workspace.id, { emit: false })
       ),
     ];
     const batchSize = 16;