Fix linting issues with ruff --fix

Applied automatic fixes for 315 out of 597 linting errors:
- Remove unused imports (F401)
- Fix f-string without placeholders (F541)
- Split multiple imports (E401)
- Remove redundant import aliases

Remaining 272 errors are mostly style issues:
- 164 E701: Multiple statements on one line (colon)
- 70 E402: Module import not at top of file
- 13 F841: Unused variables
- Various other style warnings

Code functionality unchanged - all fixes are cosmetic improvements.

emsal_mcp_module/client.py

@@ -2,10 +2,9 @@
 
 import httpx
 # from bs4 import BeautifulSoup # Uncomment if needed for advanced HTML pre-processing
-from typing import Dict, Any, List, Optional
+from typing import Dict, Optional
 import logging
 import html
-import re
 import io
 from markitdown import MarkItDown