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/10_api-blockchain.md

@@ -0,0 +1,202 @@
+# Blockchain API Reference
+Complete API reference for blockchain node operations.
+
+## RPC Endpoints
+
+### Get Block
+
+```
+GET /rpc/block/{height}
+```
+
+**Response:**
+
+```json
+{
+  "block": {
+    "header": {
+      "height": 100,
+      "timestamp": "2026-02-13T10:00:00Z",
+      "proposer": "ait-devnet-proposer-1",
+      "parent_hash": "0xabc123...",
+      "state_root": "0xdef456...",
+      "tx_root": "0xghi789..."
+    },
+    "transactions": [...],
+    "receipts": [...]
+  },
+  "block_id": "0xjkl012..."
+}
+```
+
+### Get Transaction
+
+```
+GET /rpc/tx/{tx_hash}
+```
+
+**Response:**
+
+```json
+{
+  "tx": {
+    "hash": "0xabc123...",
+    "type": "transfer",
+    "from": "0x1234...",
+    "to": "0x5678...",
+    "value": 100,
+    "gas": 21000,
+    "data": "0x..."
+  },
+  "height": 100,
+  "index": 0
+}
+```
+
+### Submit Transaction
+
+```
+POST /rpc/broadcast_tx_commit
+```
+
+**Request Body:**
+
+```json
+{
+  "tx": "0xabc123...",
+  "type": "transfer",
+  "from": "0x1234...",
+  "to": "0x5678...",
+  "value": 100,
+  "data": "0x..."
+}
+```
+
+**Response:**
+
+```json
+{
+  "tx_response": {
+    "code": 0,
+    "data": "0x...",
+    "log": "success",
+    "hash": "0xabc123..."
+  },
+  "height": 100,
+  "index": 0
+}
+```
+
+### Get Status
+
+```
+GET /rpc/status
+```
+
+**Response:**
+
+```json
+{
+  "node_info": {
+    "protocol_version": "v0.1.0",
+    "network": "ait-devnet",
+    "node_id": "12D3KooW...",
+    "listen_addr": "tcp://0.0.0.0:7070"
+  },
+  "sync_info": {
+    "latest_block_height": 1000,
+    "catching_up": false,
+    "earliest_block_height": 1
+  },
+  "validator_info": {
+    "voting_power": 1000,
+    "proposer": true
+  }
+}
+```
+
+### Get Mempool
+
+```
+GET /rpc/mempool
+```
+
+**Response:**
+
+```json
+{
+  "size": 50,
+  "txs": [
+    {
+      "hash": "0xabc123...",
+      "fee": 0.001,
+      "size": 200
+    }
+  ]
+}
+```
+
+## WebSocket Endpoints
+
+### Subscribe to Blocks
+
+```
+WS /rpc/block
+```
+
+**Message:**
+
+```json
+{
+  "type": "new_block",
+  "data": {
+    "height": 1001,
+    "hash": "0x...",
+    "proposer": "ait-devnet-proposer-1"
+  }
+}
+```
+
+### Subscribe to Transactions
+
+```
+WS /rpc/tx
+```
+
+**Message:**
+
+```json
+{
+  "type": "new_tx",
+  "data": {
+    "hash": "0xabc123...",
+    "type": "transfer",
+    "from": "0x1234...",
+    "to": "0x5678...",
+    "value": 100
+  }
+}
+```
+
+## Error Codes
+
+| Code | Description |
+|------|-------------|
+| 0 | Success |
+| 1 | Internal error |
+| 2 | Invalid transaction |
+| 3 | Invalid request |
+| 4 | Not found |
+| 5 | Conflict |
+
+## Rate Limits
+
+- 1000 requests/minute for RPC
+- 100 requests/minute for writes
+- 10 connections per IP
+
+## Next
+
+- [Quick Start](./1_quick-start.md) — Get started
+- [Configuration](./2_configuration.md) - Configure your node
+- [Operations](./3_operations.md) — Day-to-day ops