chore: import upstream snapshot with attribution

docs_src/uri_templates/tutorial003.py

@@ -0,0 +1,25 @@
+from mcp.server import MCPServer
+from mcp.server.mcpserver import ResourceSecurity
+
+mcp = MCPServer("Bookshop")
+
+
+@mcp.resource(
+    "imports://preview/{+source}",
+    security=ResourceSecurity(exempt_params={"source"}),
+)
+def preview_import(source: str) -> str:
+    """Preview a catalog import. `source` may be an absolute path."""
+    return f"Would import from {source}"
+
+
+relaxed = MCPServer(
+    "Bookshop",
+    resource_security=ResourceSecurity(reject_path_traversal=False),
+)
+
+
+@relaxed.resource("imports://preview/{+source}")
+def preview_import_relaxed(source: str) -> str:
+    """The server-wide flag exempts every resource on `relaxed`."""
+    return f"Would import from {source}"