Added a configurable timeout knob

internal/adapter/http/handler_test.go

@@ -61,7 +61,7 @@ func TestHandlerPostRunsSuccess(t *testing.T) {
     "transcript": {"type": "file", "uri": "./t.md"}
   },
   "vars": {"k": "v"},
-  "model": {"model": "gpt-x"}
+  "model": {"model": "gpt-x", "timeout_seconds": 120}
 }`)
 	req := httptest.NewRequest(http.MethodPost, "/v1/runs", bytes.NewReader(body))
 	w := httptest.NewRecorder()
@@ -91,6 +91,9 @@ func TestHandlerPostRunsSuccess(t *testing.T) {
 	if r.last.Model == nil || r.last.Model.Model != "gpt-x" {
 		t.Fatalf("expected model override, got %#v", r.last.Model)
 	}
+	if r.last.Model.TimeoutSeconds != 120 {
+		t.Fatalf("expected timeout_seconds override 120, got %#v", r.last.Model)
+	}
 }
 
 func TestHandlerInvalidJSON(t *testing.T) {