chore: make some stuff in embeddings less stringly typed

src/openai/embeddings.rs

@@ -46,6 +46,14 @@ pub struct CreateEmbeddingRequest<Model> {
     pub user: Option<String>,
 }
 
+/// Embedding object type
+#[derive(Debug, Clone, Deserialize, Serialize)]
+#[serde(rename_all = "lowercase")]
+pub enum EmbeddingObject {
+    /// Embedding
+    Embedding,
+}
+
 /// Represents a single embedding in the response
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct Embedding {
@@ -57,7 +65,7 @@ pub struct Embedding {
     pub index: u32,
 
     /// The object type, which is always "embedding"
-    pub object: String,
+    pub object: EmbeddingObject,
 }
 
 /// Represents the possible output formats for embeddings
@@ -80,17 +88,25 @@ pub struct Usage {
     pub total_tokens: u32,
 }
 
+/// List object type
+#[derive(Debug, Clone, Deserialize, Serialize)]
+#[serde(rename_all = "lowercase")]
+pub enum ListObject {
+    /// List
+    List,
+}
+
 /// Response from the embeddings API
 #[derive(Debug, Clone, Deserialize, Serialize)]
-pub struct CreateEmbeddingResponse {
+pub struct CreateEmbeddingResponse<Model> {
     /// List of generated embeddings
     pub data: Vec<Embedding>,
 
     /// The name of the model used to generate the embeddings
-    pub model: String,
+    pub model: Model,
 
     /// The object type, which is always "list"
-    pub object: String,
+    pub object: ListObject,
 
     /// Usage information for the request
     pub usage: Usage,