[Refactor][CI] Reorganize test tree, and move slow e2e to weekly (#4951)

Signed-off-by: wangyu <410167048@qq.com>

tests/engine/test_arg_utils_shared_fields.py

@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""Tests for vllm_omni.engine.arg_utils — invariants that must
+hold for the orchestrator/engine/server CLI flag partition."""
+
+from __future__ import annotations
+
+from dataclasses import fields
+
+import pytest
+
+from vllm_omni.engine.arg_utils import (
+    SHARED_FIELDS,
+    OmniEngineArgs,
+    internal_blacklist_keys,
+    orchestrator_field_names,
+)
+
+pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
+
+
+def test_no_ambiguous_overlap_with_real_engine():
+    """OrchestratorArgs ∩ OmniEngineArgs must be ⊆ SHARED_FIELDS ∪ orchestrator-captured.
+
+    Fields that the orchestrator intentionally captures to prevent uniform
+    propagation (async_chunk, tokenizer) are excluded — they exist in both
+    classes by design but flow through DeployConfig, not kwargs forwarding.
+    """
+    # Fields on both classes by design: orchestrator captures them to prevent
+    # uniform per-stage propagation; redistributed via DeployConfig.
+    orchestrator_captured = {"async_chunk", "tokenizer"}
+
+    orch = orchestrator_field_names()
+    engine = {f.name for f in fields(OmniEngineArgs)}
+    overlap = orch & engine
+    unexpected = overlap - SHARED_FIELDS - orchestrator_captured
+    assert not unexpected, (
+        f"OmniEngineArgs has ambiguous overlap with OrchestratorArgs: "
+        f"{sorted(unexpected)}. Update SHARED_FIELDS or remove duplication."
+    )
+
+
+def test_internal_blacklist_keys_derived_from_orchestrator():
+    """Blacklist is exactly OrchestratorArgs fields minus SHARED_FIELDS.
+
+    This function replaces the old hardcoded INTERNAL_STAGE_OVERRIDE_KEYS
+    frozenset. Asserts the contract so future changes to OrchestratorArgs
+    automatically propagate to the blacklist.
+    """
+    blacklist = internal_blacklist_keys()
+    assert blacklist == orchestrator_field_names() - SHARED_FIELDS