Ryanontheinside/feat/vae compile

[ryanontheinside]

VAE Compile

This PR adds torch compile support for VAEs, which in v2v, offers a roughly equal advantage to compiling the full model (~20% e2e).

VACE Conditioning (with compiled VAE)

Metric	No Compile	Compiled
Chunk 0	2.38s (3.77 fps)	1.53s (7.84 fps)
Chunk 1 (steady)	1.15s (10.46 fps)	0.95s (12.66 fps)
Chunk 2 (steady)	1.17s (10.22 fps)	0.96s (12.51 fps)
Steady-state avg FPS	~10.3	~12.6

V2V, no VACE (with compiled VAE, compilation on first chunk)

Metric	No Compile	Compiled
Pipeline init	9.41s	80.85s
Chunk 0	1.82s (7.2 fps)	10.60s (1.5 fps)
Chunk 1	0.84s (14.3 fps)	9.43s (1.3 fps)
Chunks 2-9 avg	1.04s (11.5 fps)	0.92s (13.0 fps)
Steady-state avg (1+)	1.02s (11.9 fps)	1.87s (11.7 fps)

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