docs: reframe no_flatten comment (currently better, expected to close)

Author: blackwell-systems

src/gcf/generic.py

@@ -14,8 +14,8 @@ class GenericOptions:
     no_flatten: bool = False
     """When True, disables promotion of fixed-shape nested objects to path
     columns (e.g. "customer>name"). Nested objects use attachment syntax
-    instead. Set when targeting open-weight models that show lower
-    comprehension on flattened encoding."""
+    instead. Open-weight models currently comprehend the expanded form
+    better; this gap is expected to close."""
 
 
 def encode_generic(data: Any, opts: GenericOptions | None = None) -> str: