feat(11-01): extend PAX8 types with cost fields and sync-result shapes

- Pax8Subscription: price, partnerCost, currencyCode, productName, endDate, updatedDate
- Pax8Product: vendorName, shortDescription
- New Pax8EntitySyncResult / Pax8SyncResult mirroring AppgateSyncResult shape
- Note pre-existing unrelated tsc errors in sync-scheduler.ts (missing untracked
  appgate-factory/appgate-sync-service files in this worktree) in deferred-items.md

.planning/phases/11-company-catalog-subscription-sync/deferred-items.md

@@ -0,0 +1,16 @@
+# Deferred Items — Phase 11
+
+Items discovered during execution that are out of scope for the current
+plan/task and are not auto-fixed per the executor's scope boundary rule.
+
+## Plan 01
+
+- **Pre-existing `tsc` errors unrelated to this plan**: `lib/services/sync-scheduler.ts:446,450`
+  reference `@/lib/services/appgate-factory` and `@/lib/services/appgate-sync-service`,
+  which are untracked files present in the main repo checkout (`git status` shows them
+  as `??`) but were never committed — so they do not exist in this git worktree's
+  history. This is a worktree/commit-state artifact, not something introduced by
+  Plan 01's changes (migration 092, `lib/types/pax8.ts` extensions). Confirmed via
+  `npx tsc --noEmit --pretty` before and after this plan's edits — same 2 errors,
+  same file, unrelated to `lib/types/pax8.ts`. No action taken; will resolve itself
+  once the AppGate work is committed to the main branch/worktree base.

lib/types/pax8.ts

@@ -41,6 +41,12 @@ export interface Pax8Subscription {
   billingTerm: string | null;
   status: string | null;
   startDate: string | null;
+  price: number | null; // customer/list price (D-03)
+  partnerCost: number | null; // partner/reseller cost (D-03)
+  currencyCode: string | null;
+  productName: string | null;
+  endDate: string | null;
+  updatedDate: string | null;
   [key: string]: unknown; // escape hatch for fields not yet modeled
 }
 
@@ -50,6 +56,8 @@ export interface Pax8Product {
   vendorSku: string | null;
   name: string;
   category: string | null;
+  vendorName: string | null;
+  shortDescription: string | null;
   [key: string]: unknown; // escape hatch for fields not yet modeled
   // NOTE: the deprecated alternate-vendor-SKU field per PAX8's own schema is intentionally omitted.
 }
@@ -78,3 +86,27 @@ export interface Pax8OrderItem {
   currencyCode: string | null;
   [key: string]: unknown; // escape hatch for fields not yet modeled
 }
+
+// ─── Sync result shapes ───────────────────────────────────────────────────
+// Mirrors lib/types/appgate.ts's AppgateSyncResult/AppgateEntity shape —
+// the sync service (Plan 02) reports one Pax8EntitySyncResult per entity
+// type (companies/products/subscriptions), rolled up into a Pax8SyncResult.
+
+export interface Pax8EntitySyncResult {
+  entity: string;
+  success: boolean;
+  upserted: number;
+  tombstoned: number;
+  durationMs: number;
+  error?: string;
+}
+
+export interface Pax8SyncResult {
+  syncId: string;
+  status: 'completed' | 'failed';
+  startedAt: Date;
+  completedAt: Date | null;
+  durationMs: number;
+  entities: Pax8EntitySyncResult[];
+  errors: string[];
+}