chore: import upstream snapshot with attribution

examples/mcpserver/logging_and_progress.py

@@ -0,0 +1,31 @@
+"""MCPServer Echo Server that sends log messages and progress updates to the client"""
+
+import asyncio
+
+from mcp.server.mcpserver import Context, MCPServer
+
+# Create server
+mcp = MCPServer("Echo Server with logging and progress updates")
+
+
+@mcp.tool()
+async def echo(text: str, ctx: Context) -> str:
+    """Echo the input text sending log messages and progress updates during processing."""
+    await ctx.report_progress(progress=0, total=100)
+    await ctx.info("Starting to process echo for input: " + text)
+
+    await asyncio.sleep(2)
+
+    await ctx.info("Halfway through processing echo for input: " + text)
+    await ctx.report_progress(progress=50, total=100)
+
+    await asyncio.sleep(2)
+
+    await ctx.info("Finished processing echo for input: " + text)
+    await ctx.report_progress(progress=100, total=100)
+
+    # Progress notifications are process asynchronously by the client.
+    # A small delay here helps ensure the last notification is processed by the client.
+    await asyncio.sleep(0.1)
+
+    return text