feat: migrate tests to use centralized aitbc package utilities

- Migrate HTTP client usage from requests to aitbc.AITBCHTTPClient in test files
- Update conftest.py to use aitbc path utilities (get_data_path, get_log_path)
- Update test_model_validation.py to use aitbc validators (validate_address, validate_hash)
- Skip HTML scraping files that require raw requests (verify_toggle_removed.py)
- Migrated files: test_payment_integration.py, test_cross_node_blockchain.py, verify_transactions_fixed.py, test_tx_import.py, test_simple_import.py, test_minimal.py, test_block_import_complete.py

tests/verification/test_payment_local.py

@@ -7,13 +7,12 @@ Tests job creation with payments, escrow, release, and refund flows
 import asyncio
 import httpx
 import json
-import logging
 from datetime import datetime
 from typing import Dict, Any
+from aitbc import get_logger
 
 # Configure logging
-logging.basicConfig(level=logging.INFO)
-logger = logging.getLogger(__name__)
+logger = get_logger(__name__)
 
 # Configuration - Using localhost as we're testing from the server
 COORDINATOR_URL = "http://127.0.0.1:8000/v1"