feat(api): implement notebook management CRUD endpoints

Implement Sprint 1: Notebook Management CRUD

- Add NotebookService with full CRUD operations
- Add POST /api/v1/notebooks (create notebook)
- Add GET /api/v1/notebooks (list with pagination)
- Add GET /api/v1/notebooks/{id} (get by ID)
- Add PATCH /api/v1/notebooks/{id} (partial update)
- Add DELETE /api/v1/notebooks/{id} (delete)
- Add Pydantic models for requests/responses
- Add custom exceptions (ValidationError, NotFoundError, NotebookLMError)
- Add comprehensive unit tests (31 tests, 97% coverage)
- Add API integration tests (26 tests)
- Fix router prefix duplication
- Fix JSON serialization in error responses

BREAKING CHANGE: None

tests/unit/test_core/test_logging.py

@@ -0,0 +1,71 @@
+"""Tests for logging module."""
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+import structlog
+
+from notebooklm_agent.core.config import Settings
+from notebooklm_agent.core.logging import setup_logging
+
+
+@pytest.mark.unit
+class TestSetupLogging:
+    """Test suite for setup_logging function."""
+
+    @patch("notebooklm_agent.core.logging.structlog.configure")
+    @patch("notebooklm_agent.core.logging.logging.basicConfig")
+    def test_configures_structlog(self, mock_basic_config, mock_structlog_configure):
+        """Should configure structlog with correct processors."""
+        # Arrange
+        settings = Settings(log_level="INFO", log_format="json")
+
+        # Act
+        setup_logging(settings)
+
+        # Assert
+        mock_structlog_configure.assert_called_once()
+        call_args = mock_structlog_configure.call_args
+        assert "processors" in call_args.kwargs
+
+    @patch("notebooklm_agent.core.logging.structlog.configure")
+    @patch("notebooklm_agent.core.logging.logging.basicConfig")
+    def test_uses_json_renderer_for_json_format(self, mock_basic_config, mock_structlog_configure):
+        """Should use JSONRenderer for json log format."""
+        # Arrange
+        settings = Settings(log_level="INFO", log_format="json")
+
+        # Act
+        setup_logging(settings)
+
+        # Assert
+        processors = mock_structlog_configure.call_args.kwargs["processors"]
+        assert any("JSONRenderer" in str(p) for p in processors)
+
+    @patch("notebooklm_agent.core.logging.structlog.configure")
+    @patch("notebooklm_agent.core.logging.logging.basicConfig")
+    def test_uses_console_renderer_for_console_format(self, mock_basic_config, mock_structlog_configure):
+        """Should use ConsoleRenderer for console log format."""
+        # Arrange
+        settings = Settings(log_level="INFO", log_format="console")
+
+        # Act
+        setup_logging(settings)
+
+        # Assert
+        processors = mock_structlog_configure.call_args.kwargs["processors"]
+        assert any("ConsoleRenderer" in str(p) for p in processors)
+
+    @patch("notebooklm_agent.core.logging.structlog.configure")
+    @patch("notebooklm_agent.core.logging.logging.basicConfig")
+    def test_sets_uvicorn_log_level(self, mock_basic_config, mock_structlog_configure):
+        """Should set uvicorn loggers to WARNING."""
+        # Arrange
+        settings = Settings(log_level="INFO", log_format="json")
+
+        # Act
+        setup_logging(settings)
+
+        # Assert
+        # basicConfig should be called
+        mock_basic_config.assert_called_once()