chore(release): map devorun author + convert MoA defaults test to invariant

- AUTHOR_MAP entry for 130918800+devorun for #6636 attribution
- test_moa_defaults: was a change-detector tied to the exact frontier
  model list — flips red every OpenRouter churn. Rewritten as an
  invariant (non-empty, valid vendor/model slugs).

tests/tools/test_mixture_of_agents_tool.py

@@ -8,14 +8,17 @@ import pytest
 moa = importlib.import_module("tools.mixture_of_agents_tool")
 
 
-def test_moa_defaults_track_current_openrouter_frontier_models():
-    assert moa.REFERENCE_MODELS == [
-        "anthropic/claude-opus-4.6",
-        "google/gemini-3-pro-preview",
-        "openai/gpt-5.4-pro",
-        "deepseek/deepseek-v3.2",
-    ]
-    assert moa.AGGREGATOR_MODEL == "anthropic/claude-opus-4.6"
+def test_moa_defaults_are_well_formed():
+    # Invariants, not a catalog snapshot: the exact model list churns with
+    # OpenRouter availability (see PR #6636 where gemini-3-pro-preview was
+    # removed upstream). What we care about is that the defaults are present
+    # and valid vendor/model slugs.
+    assert isinstance(moa.REFERENCE_MODELS, list)
+    assert len(moa.REFERENCE_MODELS) >= 1
+    for m in moa.REFERENCE_MODELS:
+        assert isinstance(m, str) and "/" in m and not m.startswith("/")
+    assert isinstance(moa.AGGREGATOR_MODEL, str)
+    assert "/" in moa.AGGREGATOR_MODEL
 
 
 @pytest.mark.asyncio