```

chore: remove obsolete payment architecture and integration test documentation

- Remove AITBC_PAYMENT_ARCHITECTURE.md (dual-currency system documentation)
- Remove IMPLEMENTATION_COMPLETE_SUMMARY.md (integration test completion summary)
- Remove INTEGRATION_TEST_FIXES.md (test fixes documentation)
- Remove INTEGRATION_TEST_UPDATES.md (real features implementation notes)
- Remove PAYMENT_INTEGRATION_COMPLETE.md (wallet-coordinator integration docs)
- Remove WALLET_COORDINATOR_INTEGRATION.md (payment

docs/developer/testing/localhost-testing-scenario.md

@@ -6,7 +6,7 @@ This document outlines a comprehensive testing scenario for customers and servic
 
 ## Integration Tests
 
-### Test Suite Status (Updated 2026-01-26)
+### Test Suite Status (Updated 2026-01-29)
 
 The integration test suite has been updated to use real implemented features:
 
@@ -18,6 +18,16 @@ The integration test suite has been updated to use real implemented features:
 5. **Marketplace Integration** - Connects to live marketplace
 6. **Security Integration** - Uses real ZK proof features
 
+#### 🆕 Cross-Site Synchronization (2026-01-29)
+- Multi-site blockchain deployment active
+- 3 nodes across 2 sites with RPC synchronization
+- Transaction propagation between sites enabled
+- ✅ Block import endpoint fully functional (/blocks/import)
+- Test endpoints:
+  - Local nodes: https://aitbc.bubuit.net/rpc/, /rpc2/
+  - Remote node: http://aitbc.keisanki.net/rpc/
+- Status: ✅ COMPLETE - Full cross-site synchronization active
+
 #### ⏸️ Skipped Tests (1)
 1. **Wallet Payment Flow** - Awaiting wallet-coordinator integration