Fix chunking strategy serialization and field visibility (#288)

* Fix AssistantVectorStoreChunkingStrategy rename and make StaticChunkingStrategy fields public

* Fix VectorStoreChunkingStrategy rename

* Fix chunking stategy static field name

---------

Co-authored-by: Niklas <71767810+niklass-l@users.noreply.github.com>

Author: nikessel

async-openai/src/types/assistant.rs

@@ -60,19 +60,24 @@ pub struct AssistantVectorStore {
 pub enum AssistantVectorStoreChunkingStrategy {
     /// The default strategy. This strategy currently uses a `max_chunk_size_tokens` of `800` and `chunk_overlap_tokens` of `400`.
     #[default]
+    #[serde(rename = "auto")]
     Auto,
-    Static(StaticChunkingStrategy),
+    #[serde(rename = "static")]
+    Static {
+        #[serde(rename = "static")]
+        config: StaticChunkingStrategy,
+    },
 }
 
 /// Static Chunking Strategy
 #[derive(Clone, Serialize, Debug, Deserialize, PartialEq, Default)]
 pub struct StaticChunkingStrategy {
     /// The maximum number of tokens in each chunk. The default value is `800`. The minimum value is `100` and the maximum value is `4096`.
-    max_chunk_size_tokens: u16,
+    pub max_chunk_size_tokens: u16,
     /// The number of tokens that overlap between chunks. The default value is `400`.
     ///
     /// Note that the overlap must not exceed half of `max_chunk_size_tokens`.
-    chunk_overlap_tokens: u16,
+    pub chunk_overlap_tokens: u16,
 }
 
 /// Represents an `assistant` that can call the model and use tools.

async-openai/src/types/vector_store.rs

@@ -39,8 +39,13 @@ pub struct CreateVectorStoreRequest {
 pub enum VectorStoreChunkingStrategy {
     /// The default strategy. This strategy currently uses a `max_chunk_size_tokens` of `800` and `chunk_overlap_tokens` of `400`.
     #[default]
+    #[serde(rename = "auto")]
     Auto,
-    Static(StaticChunkingStrategy),
+    #[serde(rename = "static")]
+    Static {
+        #[serde(rename = "static")]
+        config: StaticChunkingStrategy,
+    },
 }
 
 /// Vector store expiration policy