docs: update blockchain node documentation for Phase 1.3 completion

- Add state root validation enforcement to capabilities
- Add genesis metadata validation to capabilities
- Add auto-re-sync trigger to capabilities
- Update blockchain-node.md and architecture/4_blockchain-node.md

docs/apps/blockchain/blockchain-node.md

@@ -16,6 +16,9 @@ Production-ready blockchain node for AITBC with fixed supply and secure key mana
 - PostgreSQL mempool persistence (production nodes)
 - SQLite chain database with Alembic migrations
 - Multi-chain support (separate data directories per chain ID)
+- **State root validation enforcement** (Phase 1.3) - Validates state roots on block import
+- **Genesis metadata validation** - Verifies genesis block allocation metadata
+- **Auto-re-sync trigger** - Automatic re-sync after consecutive state root rejections
 
 ## Architecture
 

docs/architecture/4_blockchain-node.md

@@ -16,6 +16,9 @@ The AITBC Blockchain Node is the core infrastructure component that maintains th
 - Comprehensive observability with Prometheus metrics
 - SQLModel-based data persistence
 - Built-in devnet tooling and scripts
+- **State root validation enforcement** (Phase 1.3) - Validates state roots on block import
+- **Genesis metadata validation** - Verifies genesis block allocation metadata
+- **Auto-re-sync trigger** - Automatic re-sync after consecutive state root rejections
 
 ## Architecture