fix: resolve CI/CD linting issues

- Remove unused imports (F401) from analyzers and test files
- Remove unused typing imports (Any, Dict, List, Optional)
- Remove unused datetime imports
- Remove unused rich.columns import
- Remove unused pytest imports in test files

src/cli.py

@@ -1,6 +1,5 @@
 from typing import Optional
 import os
-from datetime import datetime
 
 import click
 from rich.console import Console