document lazy_imports param

Author: devalog

fern/products/sdks/overview/python/configuration.mdx

@@ -107,6 +107,12 @@ When enabled, generates utility methods for working with union types, including
   Feature flag that removes the usage of request objects, and instead uses parameters in function signatures where possible.
 </ParamField>
 
+<ParamField path="lazy_imports" type="bool" default="true" required={false} toc={true}>
+  Enables lazy loading of client imports. When enabled, modules and classes are imported only when first accessed rather than at package initialization. This reduces memory footprint when using a small portion of a large API, at the cost of a latency penalty when first accessing a client. 
+  
+  Set to `false` to restore eager loading behavior.
+</ParamField>
+
 <ParamField path="package-name" type="string" default="null" required={false} toc={true}>
 
 Specifies the Python package name that users will import your generated client