chore: import upstream snapshot with attribution

examples/snippets/servers/tool_progress.py

@@ -0,0 +1,20 @@
+from mcp.server.mcpserver import Context, MCPServer
+
+mcp = MCPServer(name="Progress Example")
+
+
+@mcp.tool()
+async def long_running_task(task_name: str, ctx: Context, steps: int = 5) -> str:
+    """Execute a task with progress updates."""
+    await ctx.info(f"Starting: {task_name}")  # pyright: ignore[reportDeprecated]
+
+    for i in range(steps):
+        progress = (i + 1) / steps
+        await ctx.report_progress(
+            progress=progress,
+            total=1.0,
+            message=f"Step {i + 1}/{steps}",
+        )
+        await ctx.debug(f"Completed step {i + 1}")  # pyright: ignore[reportDeprecated]
+
+    return f"Task '{task_name}' completed"