fix(swagger): describe backend metadata as an object

Swag cannot resolve json.RawMessage in OpenAIResponse and aborts the daily
schema generation. Set its Swagger type without changing JSON encoding,
and regenerate the checked-in specifications.

Assisted-by: Codex:gpt-6

core/schema/openai.go

@@ -99,7 +99,7 @@ type OpenAIResponse struct {
 	// OpenAI-SDK consumers that filter on a truthy `result.usage`
 	// (continuedev/continue, Kilo Code, Roo Code, etc.).
 	Usage    *OpenAIUsage    `json:"usage,omitempty"`
-	Metadata json.RawMessage `json:"metadata,omitempty"`
+	Metadata json.RawMessage `json:"metadata,omitempty" swaggertype:"object"`
 }
 
 // StreamOptions mirrors OpenAI's `stream_options` request field. The only

swagger/docs.go

@@ -7313,6 +7313,9 @@ const docTemplate = `{
                 "id": {
                     "type": "string"
                 },
+                "metadata": {
+                    "type": "object"
+                },
                 "model": {
                     "type": "string"
                 },

swagger/swagger.json

@@ -7310,6 +7310,9 @@
                 "id": {
                     "type": "string"
                 },
+                "metadata": {
+                    "type": "object"
+                },
                 "model": {
                     "type": "string"
                 },

swagger/swagger.yaml

@@ -2266,6 +2266,8 @@ definitions:
         type: array
       id:
         type: string
+      metadata:
+        type: object
       model:
         type: string
       object: