Merge-window drift broke the new environment-variable ratchet on main
(build 14119): #6255 added the VLLM_OMNI_ASYNC_OUTPUT_TIMEOUT read in
the diffusion engine and #6362 removed the last package reference to
ROSVOT_SOURCE_DIR, both after #6217's CI run.
- Classify VLLM_OMNI_ASYNC_OUTPUT_TIMEOUT as PUBLIC_OMNI and document
it in the environment-variables reference page.
- Drop the stale ROSVOT_SOURCE_DIR model-specific row now that the
SoulX-Singer implementation is gone.
- Update the reviewed snapshot counts and disposition tables to match.
Signed-off-by: hsliuustc0106 <liuhongsheng4@huawei.com>
hsliuustc0106