Add sys import to test files and remove obsolete integration tests

- Add sys import to 29 test files across agent-coordinator, blockchain-event-bridge, blockchain-node, and coordinator-api
- Remove apps/blockchain-event-bridge/tests/test_integration.py (obsolete bridge integration tests)
- Remove apps/coordinator-api/tests/test_integration.py (obsolete API integration tests)
- Implement GPU registration in marketplace_gpu.py with GPURegistry model persistence

apps/marketplace/tests/test_unit_marketplace.py

@@ -0,0 +1,178 @@
+"""Unit tests for agent marketplace service"""
+
+import pytest
+import sys
+from pathlib import Path
+
+# Add app src to path
+project_root = Path(__file__).parent.parent.parent.parent
+sys.path.insert(0, str(project_root / "apps" / "marketplace"))
+
+from agent_marketplace import app, GPUOffering, DealRequest, DealConfirmation, MinerRegistration
+
+
+@pytest.mark.unit
+def test_app_initialization():
+    """Test that the FastAPI app initializes correctly"""
+    assert app is not None
+    assert app.title == "AITBC Agent-First GPU Marketplace"
+    assert app.version == "1.0.0"
+
+
+@pytest.mark.unit
+def test_gpu_offering_model():
+    """Test GPUOffering model"""
+    offering = GPUOffering(
+        miner_id="miner_123",
+        gpu_model="RTX 4090",
+        gpu_memory=24576,
+        cuda_cores=16384,
+        price_per_hour=0.50,
+        available_hours=24,
+        chains=["ait-devnet", "ait-testnet"],
+        capabilities=["inference", "training"]
+    )
+    assert offering.miner_id == "miner_123"
+    assert offering.gpu_model == "RTX 4090"
+    assert offering.gpu_memory == 24576
+    assert offering.price_per_hour == 0.50
+    assert offering.chains == ["ait-devnet", "ait-testnet"]
+
+
+@pytest.mark.unit
+def test_gpu_offering_defaults():
+    """Test GPUOffering with default values"""
+    offering = GPUOffering(
+        miner_id="miner_123",
+        gpu_model="RTX 4090",
+        gpu_memory=24576,
+        cuda_cores=16384,
+        price_per_hour=0.50,
+        available_hours=24,
+        chains=["ait-devnet"],
+        capabilities=["inference"]
+    )
+    assert offering.min_rental_hours == 1
+    assert offering.max_concurrent_jobs == 1
+
+
+@pytest.mark.unit
+def test_deal_request_model():
+    """Test DealRequest model"""
+    request = DealRequest(
+        offering_id="offering_123",
+        buyer_id="buyer_123",
+        rental_hours=10,
+        chain="ait-devnet",
+        special_requirements="Need for high performance"
+    )
+    assert request.offering_id == "offering_123"
+    assert request.buyer_id == "buyer_123"
+    assert request.rental_hours == 10
+    assert request.chain == "ait-devnet"
+
+
+@pytest.mark.unit
+def test_deal_request_without_special_requirements():
+    """Test DealRequest without special requirements"""
+    request = DealRequest(
+        offering_id="offering_123",
+        buyer_id="buyer_123",
+        rental_hours=10,
+        chain="ait-devnet"
+    )
+    assert request.special_requirements is None
+
+
+@pytest.mark.unit
+def test_deal_confirmation_model():
+    """Test DealConfirmation model"""
+    confirmation = DealConfirmation(
+        deal_id="deal_123",
+        miner_confirmation=True,
+        chain="ait-devnet"
+    )
+    assert confirmation.deal_id == "deal_123"
+    assert confirmation.miner_confirmation is True
+    assert confirmation.chain == "ait-devnet"
+
+
+@pytest.mark.unit
+def test_deal_confirmation_rejection():
+    """Test DealConfirmation with rejection"""
+    confirmation = DealConfirmation(
+        deal_id="deal_123",
+        miner_confirmation=False,
+        chain="ait-devnet"
+    )
+    assert confirmation.miner_confirmation is False
+
+
+@pytest.mark.unit
+def test_miner_registration_model():
+    """Test MinerRegistration model"""
+    registration = MinerRegistration(
+        miner_id="miner_123",
+        wallet_address="0x1234567890abcdef",
+        preferred_chains=["ait-devnet", "ait-testnet"],
+        gpu_specs={"model": "RTX 4090", "memory": 24576}
+    )
+    assert registration.miner_id == "miner_123"
+    assert registration.wallet_address == "0x1234567890abcdef"
+    assert registration.preferred_chains == ["ait-devnet", "ait-testnet"]
+
+
+@pytest.mark.unit
+def test_miner_registration_defaults():
+    """Test MinerRegistration with default pricing model"""
+    registration = MinerRegistration(
+        miner_id="miner_123",
+        wallet_address="0x1234567890abcdef",
+        preferred_chains=["ait-devnet"],
+        gpu_specs={"model": "RTX 4090"}
+    )
+    assert registration.pricing_model == "hourly"
+
+
+@pytest.mark.unit
+def test_gpu_offering_negative_price():
+    """Test GPUOffering with negative price"""
+    offering = GPUOffering(
+        miner_id="miner_123",
+        gpu_model="RTX 4090",
+        gpu_memory=24576,
+        cuda_cores=16384,
+        price_per_hour=-0.50,
+        available_hours=24,
+        chains=["ait-devnet"],
+        capabilities=["inference"]
+    )
+    assert offering.price_per_hour == -0.50
+
+
+@pytest.mark.unit
+def test_gpu_offering_zero_hours():
+    """Test GPUOffering with zero available hours"""
+    offering = GPUOffering(
+        miner_id="miner_123",
+        gpu_model="RTX 4090",
+        gpu_memory=24576,
+        cuda_cores=16384,
+        price_per_hour=0.50,
+        available_hours=0,
+        chains=["ait-devnet"],
+        capabilities=["inference"]
+    )
+    assert offering.available_hours == 0
+
+
+@pytest.mark.unit
+def test_deal_request_negative_hours():
+    """Test DealRequest with negative rental hours"""
+    request = DealRequest(
+        offering_id="offering_123",
+        buyer_id="buyer_123",
+        rental_hours=-10,
+        chain="ait-devnet"
+    )
+    assert request.rental_hours == -10