fix: Query default values can't be set in Annotated

The error is that Query default values can't be set in Annotated; they
must be set with = in the function signature.
See the error:

```
The error is that Query default values can't be set in Annotated; they
must be set with = in the function signature. Searching for where
include_embeddings is defined:
```

Signed-off-by: Sébastien Han <seb@redhat.com>

docs/static/experimental-llama-stack-spec.yaml

@@ -5326,6 +5326,23 @@ components:
         text:
           type: string
           title: Text
+        embedding:
+          anyOf:
+          - items:
+              type: number
+            type: array
+          - type: 'null'
+        chunk_metadata:
+          anyOf:
+          - $ref: '#/components/schemas/ChunkMetadata'
+            title: ChunkMetadata
+          - type: 'null'
+          title: ChunkMetadata
+        metadata:
+          anyOf:
+          - additionalProperties: true
+            type: object
+          - type: 'null'
       type: object
       required:
       - type
@@ -5402,6 +5419,7 @@ components:
         has_more:
           type: boolean
           title: Has More
+          default: false
         next_page:
           anyOf:
           - type: string
@@ -5409,7 +5427,6 @@ components:
       type: object
       required:
       - data
-      - has_more
       title: VectorStoreFileContentResponse
       description: Represents the parsed content of a vector store file.
     VectorStoreFileCounts:
@@ -5669,7 +5686,7 @@ components:
       - file_counts
       title: VectorStoreObject
       description: OpenAI Vector Store object.
-    VectorStoreSearchResponse:
+    VectorStoreSearchResponse-Output:
       properties:
         file_id:
           type: string
@@ -5716,7 +5733,7 @@ components:
           title: Search Query
         data:
           items:
-            $ref: '#/components/schemas/VectorStoreSearchResponse'
+            $ref: '#/components/schemas/VectorStoreSearchResponse-Output'
           type: array
           title: Data
         has_more:
@@ -8957,6 +8974,41 @@ components:
       - query
       title: VectorStoreSearchRequest
       type: object
+    VectorStoreSearchResponse:
+      description: Response from searching a vector store.
+      properties:
+        file_id:
+          title: File Id
+          type: string
+        filename:
+          title: Filename
+          type: string
+        score:
+          title: Score
+          type: number
+        attributes:
+          anyOf:
+          - additionalProperties:
+              anyOf:
+              - type: string
+              - type: number
+              - type: boolean
+              title: string | number | boolean
+            type: object
+          - type: 'null'
+          nullable: true
+        content:
+          items:
+            $ref: '#/components/schemas/VectorStoreContent'
+          title: Content
+          type: array
+      required:
+      - file_id
+      - filename
+      - score
+      - content
+      title: VectorStoreSearchResponse
+      type: object
   responses:
     BadRequest400:
       description: The request was invalid or malformed