feat(phase-6): Complete testing and deployment setup

Testing:
- Add pytest configuration (pytest.ini)
- Add test fixtures (tests/conftest.py)
- Add ContentGenerator tests (13 tests)
- Add ContentScheduler tests (16 tests)
- Add PublisherManager tests (16 tests)
- All 45 tests passing

Production Docker:
- Add docker-compose.prod.yml with healthchecks, resource limits
- Add Dockerfile.prod with multi-stage build, non-root user
- Add nginx.prod.conf with SSL, rate limiting, security headers
- Add .env.prod.example template

Maintenance Scripts:
- Add backup.sh for database and media backups
- Add restore.sh for database restoration
- Add cleanup.sh for log rotation and Docker cleanup
- Add healthcheck.sh with Telegram alerts

Documentation:
- Add DEPLOY.md with complete deployment guide

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/conftest.py

@@ -0,0 +1,124 @@
+"""
+Test fixtures and configuration.
+"""
+
+import pytest
+from unittest.mock import MagicMock, AsyncMock, patch
+from datetime import datetime, timedelta
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from app.core.database import Base
+
+
+# In-memory SQLite for testing
+TEST_DATABASE_URL = "sqlite:///:memory:"
+
+
+@pytest.fixture
+def test_engine():
+    """Create an in-memory SQLite engine for testing."""
+    engine = create_engine(
+        TEST_DATABASE_URL,
+        connect_args={"check_same_thread": False}
+    )
+    Base.metadata.create_all(bind=engine)
+    yield engine
+    Base.metadata.drop_all(bind=engine)
+
+
+@pytest.fixture
+def test_session(test_engine):
+    """Create a test database session."""
+    TestSessionLocal = sessionmaker(
+        autocommit=False, autoflush=False, bind=test_engine
+    )
+    session = TestSessionLocal()
+    yield session
+    session.close()
+
+
+@pytest.fixture
+def mock_openai_client():
+    """Mock OpenAI client for DeepSeek API tests."""
+    mock_client = MagicMock()
+
+    mock_response = MagicMock()
+    mock_response.choices = [MagicMock()]
+    mock_response.choices[0].message.content = "Generated test content #TechTip #AI"
+
+    mock_client.chat.completions.create.return_value = mock_response
+
+    return mock_client
+
+
+@pytest.fixture
+def mock_httpx_client():
+    """Mock httpx client for API calls."""
+    mock_client = AsyncMock()
+    mock_response = AsyncMock()
+    mock_response.status_code = 200
+    mock_response.json.return_value = {"id": "123", "success": True}
+    mock_client.get.return_value = mock_response
+    mock_client.post.return_value = mock_response
+    return mock_client
+
+
+@pytest.fixture
+def sample_product():
+    """Sample product data for testing."""
+    return {
+        "name": "Laptop HP Pavilion",
+        "description": "Laptop potente para trabajo y gaming",
+        "price": 15999.00,
+        "category": "laptops",
+        "specs": {
+            "processor": "Intel Core i5",
+            "ram": "16GB",
+            "storage": "512GB SSD"
+        },
+        "highlights": ["Alta velocidad", "Diseño compacto", "Garantía 2 años"]
+    }
+
+
+@pytest.fixture
+def sample_service():
+    """Sample service data for testing."""
+    return {
+        "name": "Automatización con IA",
+        "description": "Automatiza tus procesos con inteligencia artificial",
+        "category": "ai_automation",
+        "target_sectors": ["retail", "manufactura", "servicios"],
+        "benefits": ["Reduce costos", "Aumenta productividad", "24/7 operación"],
+        "call_to_action": "Agenda una demo gratuita"
+    }
+
+
+@pytest.fixture
+def sample_interaction():
+    """Sample interaction data for testing."""
+    return {
+        "content": "¿Qué procesador recomiendas para edición de video?",
+        "type": "comment",
+        "platform": "x",
+        "author": "user123"
+    }
+
+
+@pytest.fixture
+def mock_settings():
+    """Mock settings for testing."""
+    with patch('app.core.config.settings') as mock:
+        mock.DEEPSEEK_API_KEY = "test-api-key"
+        mock.DEEPSEEK_BASE_URL = "https://api.deepseek.com"
+        mock.BUSINESS_NAME = "Consultoría AS"
+        mock.BUSINESS_LOCATION = "Tijuana, México"
+        mock.BUSINESS_WEBSITE = "https://consultoria-as.com"
+        mock.CONTENT_TONE = "Profesional pero accesible"
+        yield mock
+
+
+@pytest.fixture
+def fixed_datetime():
+    """Fixed datetime for consistent testing."""
+    return datetime(2024, 6, 15, 10, 0, 0)  # Saturday 10:00