Make OpenTelemetry tracing the single default middleware (#2995)

docs_src/opentelemetry/tutorial001.py

@@ -0,0 +1,9 @@
+from mcp.server import MCPServer
+
+mcp = MCPServer("Bookshop")
+
+
+@mcp.tool()
+def search_books(query: str) -> str:
+    """Search the catalog by title or author."""
+    return f"Found 3 books matching {query!r}."