[INIT-001] Initial project setup with Clean Architecture (feat)

- Implemented Clean Architecture with Domain, Application, Infrastructure, Presentation layers
- Added comprehensive project structure following SOLID principles
- Created Kubernetes deployment with Helm charts (HPA, PDB, NetworkPolicy)
- Configured ArgoCD for automated deployment (production + staging)
- Implemented CI/CD pipeline with GitHub Actions
- Added comprehensive documentation (handbook, architecture, coding standards)
- Configured PostgreSQL, Redis, Celery for backend services
- Created modern landing page with Persian fonts (Vazirmatn)
- Added Docker multi-stage build for production
- Configured development tools (pytest, black, flake8, mypy, isort)
- Added pre-commit hooks for code quality
- Implemented Makefile for common operations

tests/conftest.py

@@ -0,0 +1,82 @@
+"""Pytest configuration and fixtures.
+
+This module contains shared fixtures for all tests.
+"""
+
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, Session
+from typing import Generator
+
+from src.config.database import Base
+from src.infrastructure.cache.redis_client import get_redis
+
+
+# Test Database
+TEST_DATABASE_URL = "sqlite:///./test.db"
+
+engine = create_engine(
+    TEST_DATABASE_URL,
+    connect_args={"check_same_thread": False}
+)
+TestingSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+@pytest.fixture(scope="function")
+def db_session() -> Generator[Session, None, None]:
+    """Create a fresh database session for each test.
+    
+    Yields:
+        Session: Database session
+    """
+    Base.metadata.create_all(bind=engine)
+    session = TestingSessionLocal()
+    try:
+        yield session
+    finally:
+        session.close()
+        Base.metadata.drop_all(bind=engine)
+
+
+@pytest.fixture(scope="function")
+def redis_client():
+    """Get Redis client for testing.
+    
+    Returns:
+        Redis client instance
+    """
+    client = get_redis()
+    yield client
+    # Cleanup
+    client.flushdb()
+
+
+@pytest.fixture
+def sample_user_data() -> dict:
+    """Sample user data for testing.
+    
+    Returns:
+        dict: User data
+    """
+    return {
+        "email": "test@example.com",
+        "password": "SecurePassword123!",
+        "full_name": "Test User",
+        "phone": "+989123456789",
+    }
+
+
+@pytest.fixture
+def sample_service_data() -> dict:
+    """Sample service data for testing.
+    
+    Returns:
+        dict: Service data
+    """
+    return {
+        "name": "Test VPS",
+        "type": "vps",
+        "plan_id": 1,
+        "status": "active",
+    }
+