Update API specs for 2.1 (#699)

* Updating API specs for 2.1

* Updated API and SDK docs

specs/api/components/schemas/embeddings-query/DocumentEmbeddingsQueryResponse.yaml

@@ -1,12 +1,22 @@
 type: object
-description: Document embeddings query response
+description: Document embeddings query response with matching chunks and similarity scores
 properties:
   chunks:
     type: array
-    description: Similar document chunks (text strings)
+    description: Matching document chunks with similarity scores
     items:
-      type: string
+      type: object
+      properties:
+        chunk_id:
+          type: string
+          description: Chunk identifier URI
+          example: "urn:trustgraph:chunk:abc123"
+        score:
+          type: number
+          description: Similarity score (higher is more similar)
+          example: 0.89
     example:
-      - "Quantum computing uses quantum mechanics principles for computation..."
-      - "Neural networks are computing systems inspired by biological neurons..."
-      - "Machine learning algorithms learn patterns from data..."
+      - chunk_id: "urn:trustgraph:chunk:abc123"
+        score: 0.95
+      - chunk_id: "urn:trustgraph:chunk:def456"
+        score: 0.82

specs/api/components/schemas/embeddings-query/GraphEmbeddingsQueryResponse.yaml

@@ -1,12 +1,21 @@
 type: object
-description: Graph embeddings query response
+description: Graph embeddings query response with matching entities and similarity scores
 properties:
   entities:
     type: array
-    description: Similar entities (RDF values)
+    description: Matching graph entities with similarity scores
     items:
-      $ref: '../../common/RdfValue.yaml'
+      type: object
+      properties:
+        entity:
+          $ref: '../../common/RdfValue.yaml'
+          description: Matching graph entity
+        score:
+          type: number
+          description: Similarity score (higher is more similar)
+          example: 0.92
     example:
-      - {v: "https://example.com/person/alice", e: true}
-      - {v: "https://example.com/person/bob", e: true}
-      - {v: "https://example.com/concept/quantum", e: true}
+      - entity: {t: i, i: "https://example.com/person/alice"}
+        score: 0.95
+      - entity: {t: i, i: "https://example.com/concept/quantum"}
+        score: 0.82