feat: implement v0.2.0 release features - agent-first evolution

✅ v0.2 Release Preparation:
- Update version to 0.2.0 in pyproject.toml
- Create release build script for CLI binaries
- Generate comprehensive release notes

✅ OpenClaw DAO Governance:
- Implement complete on-chain voting system
- Create DAO smart contract with Governor framework
- Add comprehensive CLI commands for DAO operations
- Support for multiple proposal types and voting mechanisms

✅ GPU Acceleration CI:
- Complete GPU benchmark CI workflow
- Comprehensive performance testing suite
- Automated benchmark reports and comparison
- GPU optimization monitoring and alerts

✅ Agent SDK Documentation:
- Complete SDK documentation with examples
- Computing agent and oracle agent examples
- Comprehensive API reference and guides
- Security best practices and deployment guides

✅ Production Security Audit:
- Comprehensive security audit framework
- Detailed security assessment (72.5/100 score)
- Critical issues identification and remediation
- Security roadmap and improvement plan

✅ Mobile Wallet & One-Click Miner:
- Complete mobile wallet architecture design
- One-click miner implementation plan
- Cross-platform integration strategy
- Security and user experience considerations

✅ Documentation Updates:
- Add roadmap badge to README
- Update project status and achievements
- Comprehensive feature documentation
- Production readiness indicators

🚀 Ready for v0.2.0 release with agent-first architecture

docs/advanced/01_blockchain/9_upgrades.md

@@ -0,0 +1,77 @@
+# Node Upgrades
+Guide for upgrading your blockchain node.
+
+## Upgrade Process
+
+### Check Current Version
+
+```bash
+aitbc-chain version
+```
+
+### Check for Updates
+
+```bash
+aitbc-chain check-update
+```
+
+### Upgrade Steps
+
+```bash
+# 1. Backup data
+aitbc-chain backup --output /backup/chain-$(date +%Y%m%d).tar.gz
+
+# 2. Stop node gracefully
+aitbc-chain stop
+
+# 3. Upgrade software
+pip install --upgrade aitbc-chain
+
+# 4. Review migration notes
+cat CHANGELOG.md
+
+# 5. Start node
+aitbc-chain start
+```
+
+## Version-Specific Upgrades
+
+### v0.1.0 → v0.2.0
+
+```bash
+# Database migration required
+aitbc-chain migrate --from v0.1.0
+```
+
+### v0.2.0 → v0.3.0
+
+```bash
+# Configuration changes
+aitbc-chain migrate-config --from v0.2.0
+```
+
+## Rollback Procedure
+
+```bash
+# If issues occur, rollback
+pip install aitbc-chain==0.1.0
+
+# Restore from backup
+aitbc-chain restore --input /backup/chain-YYYYMMDD.tar.gz
+
+# Start old version
+aitbc-chain start
+```
+
+## Upgrade Notifications
+
+```bash
+# Enable upgrade alerts
+aitbc-chain alert --metric upgrade_available --action notify
+```
+
+## Next
+
+- [Quick Start](./1_quick-start.md) — Get started
+- [Operations](./3_operations.md) — Day-to-day ops
+- [Monitoring](./7_monitoring.md) — Monitoring