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/plugin-marketplace/tests/test_integration_plugin_marketplace.py

@@ -0,0 +1,165 @@
+"""Integration tests for plugin marketplace service"""
+
+import pytest
+import sys
+import sys
+from pathlib import Path
+from fastapi.testclient import TestClient
+
+
+from main import app, MarketplaceReview, PluginPurchase, DeveloperApplication, reviews, purchases, developer_applications
+
+
+@pytest.fixture(autouse=True)
+def reset_state():
+    """Reset global state before each test"""
+    reviews.clear()
+    purchases.clear()
+    developer_applications.clear()
+    yield
+    reviews.clear()
+    purchases.clear()
+    developer_applications.clear()
+
+
+@pytest.mark.integration
+def test_get_featured_plugins_api():
+    """Test getting featured plugins API"""
+    client = TestClient(app)
+    response = client.get("/api/v1/marketplace/featured")
+    assert response.status_code == 200
+    data = response.json()
+    assert "featured_plugins" in data
+
+
+@pytest.mark.integration
+def test_get_popular_plugins_api():
+    """Test getting popular plugins API"""
+    client = TestClient(app)
+    response = client.get("/api/v1/marketplace/popular")
+    assert response.status_code == 200
+    data = response.json()
+    assert "popular_plugins" in data
+
+
+@pytest.mark.integration
+def test_get_recent_plugins_api():
+    """Test getting recent plugins API"""
+    client = TestClient(app)
+    response = client.get("/api/v1/marketplace/recent")
+    assert response.status_code == 200
+    data = response.json()
+    assert "recent_plugins" in data
+
+
+@pytest.mark.integration
+def test_get_marketplace_stats_api():
+    """Test getting marketplace stats API"""
+    client = TestClient(app)
+    response = client.get("/api/v1/marketplace/stats")
+    assert response.status_code == 200
+    data = response.json()
+    assert "stats" in data
+
+
+@pytest.mark.integration
+def test_create_review():
+    """Test creating a review"""
+    client = TestClient(app)
+    review = MarketplaceReview(
+        plugin_id="plugin_123",
+        user_id="user_123",
+        rating=5,
+        title="Great plugin",
+        content="Excellent functionality"
+    )
+    response = client.post("/api/v1/reviews", json=review.model_dump())
+    assert response.status_code == 200
+    data = response.json()
+    assert data["review_id"]
+    assert data["status"] == "created"
+
+
+@pytest.mark.integration
+def test_get_plugin_reviews_api():
+    """Test getting plugin reviews API"""
+    client = TestClient(app)
+    # Create a review first
+    review = MarketplaceReview(
+        plugin_id="plugin_123",
+        user_id="user_123",
+        rating=5,
+        title="Great plugin",
+        content="Excellent functionality"
+    )
+    client.post("/api/v1/reviews", json=review.model_dump())
+    
+    response = client.get("/api/v1/reviews/plugin_123")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["plugin_id"] == "plugin_123"
+    assert "reviews" in data
+
+
+@pytest.mark.integration
+def test_get_plugin_reviews_no_reviews():
+    """Test getting plugin reviews when no reviews exist"""
+    client = TestClient(app)
+    response = client.get("/api/v1/reviews/nonexistent")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["total_reviews"] == 0
+
+
+@pytest.mark.integration
+def test_create_purchase():
+    """Test creating a purchase"""
+    client = TestClient(app)
+    purchase = PluginPurchase(
+        plugin_id="plugin_123",
+        user_id="user_123",
+        price=99.99,
+        payment_method="credit_card"
+    )
+    response = client.post("/api/v1/purchases", json=purchase.model_dump())
+    assert response.status_code == 200
+    data = response.json()
+    assert data["purchase_id"]
+    assert data["status"] == "completed"
+
+
+@pytest.mark.integration
+def test_apply_developer():
+    """Test applying to become a developer"""
+    client = TestClient(app)
+    application = DeveloperApplication(
+        developer_name="Dev Name",
+        email="dev@example.com",
+        experience="5 years",
+        description="Experienced developer"
+    )
+    response = client.post("/api/v1/developers/apply", json=application.model_dump())
+    assert response.status_code == 200
+    data = response.json()
+    assert data["application_id"]
+    assert data["status"] == "pending"
+
+
+@pytest.mark.integration
+def test_get_verified_developers_api():
+    """Test getting verified developers API"""
+    client = TestClient(app)
+    response = client.get("/api/v1/developers/verified")
+    assert response.status_code == 200
+    data = response.json()
+    assert "verified_developers" in data
+
+
+@pytest.mark.integration
+def test_get_developer_revenue():
+    """Test getting developer revenue"""
+    client = TestClient(app)
+    response = client.get("/api/v1/revenue/dev_123")
+    assert response.status_code == 200
+    data = response.json()
+    assert "total_revenue" in data