Bump default OpenAI text-generation model (gpt-5.2 -> gpt-5.4)

docs/sample-provider-configs/openai.yml

@@ -1,7 +1,7 @@
 base_url: https://api.openai.com/v1
 api_key: YOUR_API_KEY_HERE
 text_generation:
-  model_id: gpt-5.2
+  model_id: gpt-5.4
   prompt: "You are a brief, but helpful bot called {{ baibot_name }} powered by the {{ baibot_model_id }} model. The date/time of this conversation's start is: {{ baibot_conversation_start_time_utc }}."
   temperature: 1.0
   # Reasoning models need to use `max_completion_tokens` instead of `max_response_tokens`.

etc/app/config.yml.dist

@@ -91,7 +91,7 @@ agents:
     #     base_url: https://api.openai.com/v1
     #     api_key: ""
     #     text_generation:
-    #       model_id: gpt-5.2
+    #       model_id: gpt-5.4
     #       prompt: "You are a brief, but helpful bot called {{ baibot_name }} powered by the {{ baibot_model_id }} model. The date/time of this conversation's start is: {{ baibot_conversation_start_time_utc }}."
     #       temperature: 1.0
     #       # Reasoning models need to use `max_completion_tokens` instead of `max_response_tokens`.

src/agent/provider/openai/config.rs

@@ -84,7 +84,7 @@ impl Default for TextGenerationConfig {
 }
 
 fn default_text_model_id() -> String {
-    "gpt-5.2".to_owned()
+    "gpt-5.4".to_owned()
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]