- Update datetime.now(UTC) to datetime.now(timezone.utc) across all test files
- Fix test_block_import.py to use dynamic base height from current chain head
- Fix test_block_import_complete.py to calculate base_height from current head
- Add SSH options for non-interactive connection in test_cross_node_blockchain.py
- Add timeout parameter to SSH subprocess call
- Update all timestamp generation to use timezone.utc
- Replace all 2,087 uses of datetime.utcnow() across 294 files
- Add UTC import to datetime statements where needed
- Addresses Python 3.12+ deprecation warning (report item #3)
- 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
- Add chain_id parameter to importBlock requests in all verification tests
- Update test_block_import.py to use high block heights to avoid conflicts with existing chain
- Simplify test_block_import.py to focus on core validation (hash, parent, conflict)
- Fix test_block_import_complete.py to use head block instead of block 1 for existing block test
- Update expected response format from status field to success field
