diffusers

0f1245a6 - Port wan-animate-2 to IterativePipelineBlocks with nested streaming

Port wan-animate-2 to IterativePipelineBlocks with nested streaming - WanAnimate2SegmentLoopWrapper is an IterativePipelineBlocks (loop variable `k`); the per-segment steps become ModularLoopPipelineBlocks operating on the shared PipelineState - the hand-rolled timestep loop in WanAnimate2SegmentDenoiseInner becomes a nested loop: WanAnimate2LoopDenoiser + WanAnimate2LoopAfterDenoiser under WanAnimate2DenoiseLoopWrapper (loop variables `i`, `t`) - loop-carried state made explicit: `out_frames` is a declared input on the prev-frames step but filtered from the wrapper's aggregated inputs; `segment_frames` accumulation moves from the decode step into the segment loop's own logic - both loops implement `stream`: events per denoise step and per segment, so test_stream_matches_call now runs for wan-animate-2 (stream == call) - regenerate stale flux2 modular_blocks docstrings; doc-builder reflow in modular_pipeline.py Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>