fix(specs): clarify when _extra and _injectedItemKey are present on hits (generated)

algolia/api-clients-automation#7031

Co-authored-by: algolia-api-clients-automation-bot[bot] <288895823+algolia-api-clients-automation-bot[bot]@users.noreply.github.com>
Co-authored-by: charlottetaylor-oss <charlotte.taylor@algolia.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: Clara Muller <5667350+ClaraMuller@users.noreply.github.com>

Author: 4 people

packages/composition/model/hitMetadata.ts

@@ -1,11 +1,11 @@
 // Code generated by OpenAPI Generator (https://openapi-generator.tech), manual changes will be lost - read more on https://github.com/algolia/api-clients-automation. DO NOT EDIT.
 
 /**
- * An object that contains the extra key-value pairs provided in the injectedItem definition.
+ * An object that contains the extra key-value pairs provided in the injectedItem definition. Only present on hits inserted by an injectedItem that defines metadata, either in its `metadata` field or sent by an external source.
  */
 export type HitMetadata = Record<string, any> & {
   /**
-   * The key of the injectedItem that inserted this metadata.
+   * The key of the injectedItem that inserted this metadata. Only present when the injectedItem\'s `metadata.hits.addItemKey` is `true`.
    */
   _injectedItemKey?: string | undefined;
 };