feat: add gpt-6.1-terra and default exploration to high reasoning

tests/unit/test_exploration_service.py

@@ -30,7 +30,7 @@ async def test_admission_uses_shared_queue_with_independent_model(service, monke
     await service.start(session["id"], "start")
     request = enqueue.call_args.args[0]
     assert request.profile == "pro"
-    assert request.runtime_overrides.model == "gpt-6.1-sol"
+    assert request.runtime_overrides.model == "gpt-6.1-terra"
     assert request.runtime_overrides.reasoning_effort == "high"
     assert request.runtime_overrides.verification_level == "final"
     assert request.conversation_id == session["id"]
@@ -193,7 +193,7 @@ def test_independent_saved_defaults_do_not_change_existing_sessions(service):
     session = service.create(CreateExploration(goal="探索设置", request_id="create"))
     service.save_settings(ExplorationConfig(model="gpt-6-astra", reasoning_effort="max"))
     later = service.create(CreateExploration(goal="另一次探索", request_id="later"))
-    assert service.repository.get(session["id"])["config"]["model"] == "gpt-6.1-sol"
+    assert service.repository.get(session["id"])["config"]["model"] == "gpt-6.1-terra"
     assert later["config"]["model"] == "gpt-6-astra"