Add pyright strict mode on the whole project (#1254)

examples/snippets/servers/lifespan_example.py

@@ -5,6 +5,7 @@ from contextlib import asynccontextmanager
 from dataclasses import dataclass
 
 from mcp.server.fastmcp import Context, FastMCP
+from mcp.server.session import ServerSession
 
 
 # Mock database class for example
@@ -50,7 +51,7 @@ mcp = FastMCP("My App", lifespan=app_lifespan)
 
 # Access type-safe lifespan context in tools
 @mcp.tool()
-def query_db(ctx: Context) -> str:
+def query_db(ctx: Context[ServerSession, AppContext]) -> str:
     """Tool that uses initialized resources."""
     db = ctx.request_context.lifespan_context.db
     return db.query()