chore: update project configuration and documentation

- Added *.egg-info/ to .gitignore to prevent egg metadata from being tracked.
- Updated virtual environment instructions in CONTRIBUTING.md and README.md to use .venv for consistency.
- Revised mkdocs.yml to include a placeholder for the repository URL when publishing.
- Cleaned up pyproject.toml by removing unnecessary pylint configuration.
- Enhanced import-format.md and runbook.md documentation for clarity on user roles and health check endpoints.

CONTRIBUTING.md

@@ -10,9 +10,9 @@
 
 2. **Create a virtual environment**
    ```bash
-   python -m venv venv
-   source venv/bin/activate   # Linux/macOS
-   # or: venv\Scripts\activate  # Windows
+   python -m venv .venv
+   source .venv/bin/activate   # Linux/macOS
+   # or: .venv\Scripts\activate  # Windows
    ```
 
 3. **Install dependencies**