feat: implement CLI blockchain features and pool hub enhancements

CLI Blockchain Features:
- Added block operations: import, export, import-chain, blocks-range
- Added messaging system commands (deploy, state, topics, create-topic, messages, post, vote, search, reputation, moderate)
- Added network force-sync operation
- Replaced marketplace handlers with actual RPC calls
- Replaced AI handlers with actual RPC calls
- Added account operations (account get)
- Added transaction query operations
- Added mempool query operations
- Created keystore_auth.py for authentication
- Removed extended features interception
- All handlers use keystore credentials for authenticated endpoints

Pool Hub Enhancements:
- Added SLA monitoring and capacity tables
- Added billing integration service
- Added SLA collector service
- Added SLA router endpoints
- Updated pool hub models and settings
- Added integration tests for billing and SLA
- Updated documentation with SLA monitoring guide

apps/pool-hub/tests/conftest.py

@@ -6,10 +6,14 @@ from pathlib import Path
 
 import pytest
 import pytest_asyncio
+from dotenv import load_dotenv
 from redis.asyncio import Redis
 from sqlalchemy.ext.asyncio import AsyncEngine, AsyncSession, async_sessionmaker, create_async_engine
 
+# Load .env file
 BASE_DIR = Path(__file__).resolve().parents[2]
+load_dotenv(BASE_DIR / ".env")
+
 POOLHUB_SRC = BASE_DIR / "pool-hub" / "src"
 if str(POOLHUB_SRC) not in sys.path:
     sys.path.insert(0, str(POOLHUB_SRC))