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.

saidsurucu-yargi-mcp-f5fa007/example_fastapi_app.py

@@ -7,11 +7,9 @@ import os
 from typing import List, Dict, Any, Optional
 from datetime import datetime
 
-from fastapi import FastAPI, HTTPException, Query, Depends, Body
+from fastapi import FastAPI, HTTPException, Query
 from fastapi.middleware.cors import CORSMiddleware
-from fastapi.responses import JSONResponse
 from pydantic import BaseModel, Field
-import json
 
 # Import the main MCP app
 from mcp_server_main import app as mcp_server