Upgrade async-openai (0.31.1 -> 0.32.1) and adapt, adding support for gpt-image-1.5

src/agent/provider/openai/config.rs

@@ -178,6 +178,7 @@ impl ImageGenerationConfig {
             "dall-e-2" => Ok(async_openai::types::images::ImageModel::DallE2),
             "dall-e-3" => Ok(async_openai::types::images::ImageModel::DallE3),
             "gpt-image-1" => Ok(async_openai::types::images::ImageModel::GptImage1),
+            "gpt-image-1.5" => Ok(async_openai::types::images::ImageModel::GptImage1dot5),
             "gpt-image-1-mini" => Ok(async_openai::types::images::ImageModel::GptImage1Mini),
             other => Ok(async_openai::types::images::ImageModel::Other(other.to_owned())),
         }

src/agent/provider/openai/controller.rs

@@ -305,6 +305,7 @@ impl ControllerTrait for Controller {
             // In fact, specifying the response format results in an error.
             ImageModel::GptImage1 => None,
             ImageModel::GptImage1Mini => None,
+            ImageModel::GptImage1dot5 => None,
             ImageModel::Other(_) => Some(ImageResponseFormat::B64Json),
         };
 
@@ -411,6 +412,7 @@ impl ControllerTrait for Controller {
             // In fact, specifying the response format results in an error.
             ImageModel::GptImage1 => None,
             ImageModel::GptImage1Mini => None,
+            ImageModel::GptImage1dot5 => None,
             ImageModel::Other(_) => Some(ImageResponseFormat::B64Json),
         };