[Bugfix] Reconcile env-var inventory with post-#6217 main drift

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>

docs/configuration/environment_variables.md

@@ -82,6 +82,7 @@ depends on the installed kernels and model path.
 | --- | --- | --- | --- | --- |
 | `SPEAKER_SAMPLES_DIR` | Filesystem path; default `~/.cache/vllm-omni/speakers` | Speech server; read when speaker storage initializes | Environment-only setting. The directory is created; filesystem errors propagate. | Stable |
 | `SPEAKER_MAX_UPLOADED` | Integer; default `1000` | Speech server; read when speaker storage initializes | Environment-only setting. A non-integer logs a warning and uses `1000`; range is not otherwise validated. | Stable |
+| `VLLM_OMNI_ASYNC_OUTPUT_TIMEOUT` | Float seconds; default `600` | Diffusion engine async-output wait in `step_streaming`; resolved per call on the request path, not at import | Environment-only setting. A non-float or `<=0` value warns once and uses the default. | Experimental |
 | `VLLM_OMNI_INPUT_WAIT_TIMEOUT_S` | Float seconds; default `600`; `<=0` disables | Full-payload input coordinator, not async-chunk transfer; read when the scheduler module imports in each worker | Environment-only setting. A non-float logs a warning and uses `600`. | Stable operational control |
 | `VLLM_OMNI_ORCH_MONITOR_PATH` | Filesystem path; default `<current-working-directory>/vllm_omni_orch_monitor_<timestamp>.json` | Orchestrator monitor enabled by `--enable-orch-monitor`; read when the monitor is created | Environment-only path override. Parent directories are created; write errors are logged. | Diagnostic |
 | `VLLM_OMNI_VIDEO_SYNC_TIMEOUT` | Float seconds; default `600` | Synchronous Videos API; read when the API server module imports | Environment-only setting. A non-float raises `ValueError` during import. | Experimental |
@@ -177,7 +178,7 @@ collection, examples, bug reports, or logs.
 
 ## Model-specific variables
 
-The audit found 57 variables read by a single model or pipeline family. They are
+The audit found 56 variables read by a single model or pipeline family. They are
 not listed as public usage options here because doing so would turn implementation
 escape hatches into an accidental compatibility contract.
 
@@ -190,7 +191,7 @@ Every audited model-specific name has a migration disposition in the
 | Request scope | 6 | Move request-varying behavior into a declared request-option schema. |
 | External | 0 | Retain only when a supported third-party library owns the contract. |
 | Internalize | 11 | Keep a debug or diagnostic switch out of public documentation and configuration. |
-| Deprecate/remove | 7 | Remove a compatibility escape hatch that has no continuing contract. |
+| Deprecate/remove | 6 | Remove a compatibility escape hatch that has no continuing contract. |
 
 The disposition is a migration target, not a statement that the existing
 environment switch is stable. Promote or request-scope work should land in

tests/config/test_environment_variables.py

@@ -164,10 +164,10 @@ def test_inventory_matches_reviewed_snapshot_counts():
     """Make an inventory expansion an explicit review decision."""
     category_counts = Counter(item.category for item in ENVIRONMENT_VARIABLE_INVENTORY.values())
     assert category_counts == {
-        EnvironmentVariableCategory.PUBLIC_OMNI: 22,
+        EnvironmentVariableCategory.PUBLIC_OMNI: 23,
         EnvironmentVariableCategory.INHERITED_VLLM: 20,
         EnvironmentVariableCategory.PLATFORM_EXTERNAL: 27,
-        EnvironmentVariableCategory.MODEL_SPECIFIC: 57,
+        EnvironmentVariableCategory.MODEL_SPECIFIC: 56,
         EnvironmentVariableCategory.BENCHMARK_TRANSITIONAL: 20,
         EnvironmentVariableCategory.INTERNAL: 2,
     }
@@ -182,7 +182,7 @@ def test_inventory_matches_reviewed_snapshot_counts():
         ModelEnvironmentVariableDisposition.REQUEST_SCOPE: 6,
         ModelEnvironmentVariableDisposition.EXTERNAL: 0,
         ModelEnvironmentVariableDisposition.INTERNALIZE: 11,
-        ModelEnvironmentVariableDisposition.DEPRECATE_REMOVE: 7,
+        ModelEnvironmentVariableDisposition.DEPRECATE_REMOVE: 6,
     }
 
 

vllm_omni/config/environment_variable_inventory.py

@@ -63,6 +63,7 @@ _PUBLIC_OMNI = (
     "OMNI_DIFFUSION_SESSION_STATE_MANAGER_MAX_SESSIONS",
     "SPEAKER_MAX_UPLOADED",
     "SPEAKER_SAMPLES_DIR",
+    "VLLM_OMNI_ASYNC_OUTPUT_TIMEOUT",
     "VLLM_OMNI_INPUT_WAIT_TIMEOUT_S",
     "VLLM_OMNI_ORCH_MONITOR_PATH",
     "VLLM_OMNI_SERVER_STORAGE__FILE_CONCURRENCY",
@@ -197,7 +198,6 @@ _MODEL_INTERNALIZE = (
 
 _MODEL_DEPRECATE_REMOVE = (
     "HIGGS_AUDIO_V2_TOKENIZER_PATH",
-    "ROSVOT_SOURCE_DIR",
     "VLLM_OMNI_LINGBOT_ACTION_ROOT",
     "VLLM_OMNI_VOXCPM_CODE_PATH",
     "VLLM_USE_FLASHINFER_MOE_FP16",