fix: resolve CI/CD workflow and linting issues

src/mcp_server_cli/server.py

@@ -1,34 +1,29 @@
 """MCP Protocol Server implementation using FastAPI."""
 
-import asyncio
-import json
 import logging
 from contextlib import asynccontextmanager
-from typing import Any, Dict, List, Optional, Callable, Awaitable
 from enum import Enum
+from pathlib import Path
+from typing import Dict, List, Optional
 
-from fastapi import FastAPI, HTTPException, Request, Depends
+from fastapi import FastAPI, HTTPException, Request
 from fastapi.middleware.cors import CORSMiddleware
-from fastapi.responses import JSONResponse, StreamingResponse
-from pydantic import BaseModel
-import sse_starlette.sse as sse
 
+from mcp_server_cli.config import AppConfig, ConfigManager
 from mcp_server_cli.models import (
-    MCPRequest,
-    MCPResponse,
-    MCPNotification,
-    MCPMethod,
-    ToolDefinition,
-    ToolCallParams,
-    ToolCallResult,
     InitializeParams,
     InitializeResult,
-    ServerInfo,
+    MCPMethod,
+    MCPRequest,
+    MCPResponse,
     ServerCapabilities,
+    ServerInfo,
+    ToolCallParams,
+    ToolCallResult,
+    ToolDefinition,
     ToolsListResult,
 )
-from mcp_server_cli.config import AppConfig, ConfigManager
-from mcp_server_cli.tools import ToolBase, ToolResult
+from mcp_server_cli.tools import ToolBase
 
 logger = logging.getLogger(__name__)