Addresses Gaohan123's post-approval review comments on #4709:
- pipeline_dreamzero: restore platform-dispatched synchronize() instead of
torch.cuda so DreamZero keeps working on non-CUDA hardware (regression
of #4399 introduced during the rebase).
- omni_scheduler_mixin: drop the VLLM_OMNI_INPUT_WAIT_TIMEOUT_S env-var
override; the full-payload input-wait timeout is now a plain constant.
- diffusion_worker: implement _DiffusionVllmModelConfig.is_diffusion by
mirroring upstream ModelConfig.is_diffusion (dLLM canvas_length check)
and document why omni DiT pipelines must not enable dLLM paths.
- qwen3_tts: make _embedding_dtype a class attribute on the talker and
prompt-embeds builder so __new__-based test stubs inherit it; remove
the (duplicated) manual assignments from the preprocess test.
- .buildkite: document why the rebase raised per-step timeouts (steps
were killed by the old limits, masking real failures; e.g. CustomVoice
passes in ~9-15 min but cold runs were killed at 20m).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: tzhouam <tzhouam@connect.ust.hk>
