diffusers

08d69774 - [utils] preserve method metadata in apply_forward_hook (#13803)

[utils] preserve method metadata in apply_forward_hook (#13803) * [utils] preserve method metadata in apply_forward_hook Add @functools.wraps to the inner wrapper so it inherits __name__, __doc__, __module__ and the signature of the wrapped method. Without this, methods decorated with @apply_forward_hook (e.g. AutoencoderKL's encode and decode) lose their docstring and signature, so doc-builder cannot render them through the [[autodoc]] directive and they show up as "wrapper" with a generic (*args, **kwargs) signature on the live API docs. The same affects VQModel, ConsistencyDecoderVAE and the other autoencoders that use the decorator. Add regression tests asserting that the wrapped method exposes the right metadata (name, docstring, signature including default values, __wrapped__) and that the underlying offload hook still fires through the wrapper. Fixes #6575 * Trim apply_forward_hook test to a single assertion