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

mcp_server/tools/automation.py

@@ -200,7 +200,7 @@ async def mobile_config(
     worker_cleanup_timeout_seconds (30), adb_auto_connect (true),
     adb_discovery_interval_seconds (10), adb_discovery_timeout_seconds (5).
     reports: formats=['docx','xlsx'] (at least one).
-    exploration: model (default gpt-6.1-sol), reasoning_effort (high), timeout_seconds
+    exploration: model (default gpt-6.1-terra), reasoning_effort (high), timeout_seconds
     (1800 active seconds), demonstration_timeout_seconds (900), demonstration_warning_seconds (60).
     API keys are never accepted or returned: use the Web UI or .env for credentials.
     Saving settings does not change an already running task. Flash/Pro are execution