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.

sayistay_mcp_module/client.py

@@ -1,13 +1,11 @@
 # sayistay_mcp_module/client.py
 
 import httpx
-import re
 from bs4 import BeautifulSoup
-from typing import Dict, Any, List, Optional, Tuple
+from typing import Dict, List, Optional, Tuple
 import logging
-import html
 import io
-from urllib.parse import urlencode, urljoin
+from urllib.parse import urlencode
 from markitdown import MarkItDown
 
 from .models import (
@@ -16,7 +14,7 @@ from .models import (
     DaireSearchRequest, DaireSearchResponse, DaireDecision,
     SayistayDocumentMarkdown
 )
-from .enums import DaireEnum, KamuIdaresiTuruEnum, WebKararKonusuEnum, WEB_KARAR_KONUSU_MAPPING
+from .enums import WEB_KARAR_KONUSU_MAPPING
 
 logger = logging.getLogger(__name__)
 if not logger.hasHandlers():