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.

yargitay_mcp_module/client.py

@@ -1,20 +1,16 @@
 # yargitay_mcp_module/client.py
 
 import httpx
-from bs4 import BeautifulSoup # Still needed for pre-processing HTML before markitdown
-from typing import Dict, Any, List, Optional
+from typing import Optional
 import logging
 import html
-import re
 import io
 from markitdown import MarkItDown
 
 from .models import (
     YargitayDetailedSearchRequest,
     YargitayApiSearchResponse,      
-    YargitayApiDecisionEntry,
-    YargitayDocumentMarkdown,     
-    CompactYargitaySearchResult 
+    YargitayDocumentMarkdown 
 )
 
 logger = logging.getLogger(__name__)

yargitay_mcp_module/models.py

@@ -1,7 +1,7 @@
 # yargitay_mcp_module/models.py
 
 from pydantic import BaseModel, Field, HttpUrl, ConfigDict
-from typing import List, Optional, Dict, Any, Literal
+from typing import List, Optional, Literal
 
 # Yargıtay Chamber/Board Options
 YargitayBirimEnum = Literal[