Add blockchain event bridge service with smart contract event integration

- Phase 1: Core bridge service with gossip broker subscription
- Phase 2: Smart contract event integration via eth_getLogs RPC endpoint
- Add contract event subscriber for AgentStaking, PerformanceVerifier, Marketplace, Bounty, CrossChainBridge
- Add contract event handlers in agent_daemon.py and marketplace.py
- Add systemd service file for blockchain-event-bridge
- Update blockchain node router.py with eth_getLogs endpoint
- Add configuration for contract addresses
- Add tests for contract subscriber and handlers (27 tests passing)

apps/blockchain-event-bridge/pyproject.toml

@@ -0,0 +1,28 @@
+[tool.poetry]
+name = "blockchain-event-bridge"
+version = "0.1.0"
+description = "Bridge between AITBC blockchain events and OpenClaw agent triggers"
+authors = ["AITBC Team"]
+readme = "README.md"
+
+[tool.poetry.dependencies]
+python = "^3.13"
+fastapi = "^0.115.0"
+uvicorn = {extras = ["standard"], version = "^0.32.0"}
+httpx = "^0.27.0"
+pydantic = "^2.9.0"
+pydantic-settings = "^2.6.0"
+prometheus-client = "^0.21.0"
+aiosqlite = "^0.20.0"
+
+[tool.poetry.group.dev.dependencies]
+pytest = "^8.3.0"
+pytest-asyncio = "^0.24.0"
+pytest-cov = "^6.0.0"
+black = "^24.10.0"
+ruff = "^0.8.0"
+mypy = "^1.13.0"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"