[refactor] Resolve config declarations onto server_args at the end of __post_init__ (#30297)

test/registered/unit/model_executor/test_pool_configurator.py

@@ -102,6 +102,10 @@ def _make_model_runner(
 
     sa = SimpleNamespace()
     sa.swa_full_tokens_ratio = swa_full_tokens_ratio
+    # The configurator reads the resolved ratio from the flags tier.
+    from sglang.srt.runtime_context import get_flags
+
+    get_flags().swa_full_tokens_ratio = swa_full_tokens_ratio
     sa.page_size = page_size
     sa.disable_radix_cache = disable_radix_cache
     sa.chunked_prefill_size = chunked_prefill_size