docs(phase-10): evolve PROJECT.md after phase completion

.planning/PROJECT.md

@@ -132,14 +132,21 @@ future milestone that will consume this data once it exists.
   browser at `/admin/workflow/executions` with "Show only fallbacks" filter.
   Validated in Phase 9: User Profile & Preferences (PROF-01..04, TZ-CHOOSER-01..02,
   THEME-01..05, CHAN-01..07, SUB-01..04, ROUTE-01..07)
+- ✓ PAX8 client + factory (OAuth2 client-credentials, `lib/services/pax8-client.ts`
+  + `lib/services/pax8-factory.ts` + `lib/types/pax8.ts`) and the PAX8 schema
+  foundation (`migrations/091_pax8_tables.sql` — companies, products,
+  subscriptions, orders, order_items, company_match_review). Live auth-proof
+  confirmed against the real PAX8 API (`scripts/verify-pax8-auth.ts`).
+  Validated in Phase 10: PAX8 Client & Auth Foundation (PAX8-01, PAX8-02)
 
 ### Active
 
 <!-- Hypotheses for this milestone — see .planning/seeds/SEED-002-pax8-integration.md -->
 
-- PAX8 client + factory, read-only sync of companies/subscriptions/catalog/
-  orders into Postgres, fuzzy-name Autotask company matching, new `/pax8`
-  page, daily sync cadence — v2.0 PAX8 Integration milestone (see above)
+- Read-only sync of companies/subscriptions/catalog/orders into Postgres,
+  fuzzy-name Autotask company matching, new `/pax8` page, daily sync cadence
+  — v2.0 PAX8 Integration milestone (see above); client/auth/schema
+  foundation from Phase 10 now validated above
 
 ### Out of Scope
 
@@ -227,4 +234,4 @@ This document evolves at phase transitions and milestone boundaries.
 4. Update Context with current state
 
 ---
-*Last updated: 2026-07-10 — v2.0 PAX8 Integration milestone started*
+*Last updated: 2026-07-10 — Phase 10: PAX8 Client & Auth Foundation complete*