Adding a CSV tests with fork.

Author: afoucret

x-pack/plugin/esql/qa/testFixtures/src/main/resources/text-embedding.csv-spec

@@ -66,3 +66,29 @@ be excellent to each other                                            | 1.0
 live long and prosper                                                 | 0.0295
 all we have to decide is what to do with the time that is given to us | 0.0214
 ;
+
+
+text_embedding with multiple knn queries in fork
+required_capability: text_embedding_function
+required_capability: dense_vector_field_type_released
+required_capability: knn_function_v5
+required_capability: fork_v9
+required_capability: semantic_text_field_caps
+
+FROM semantic_text METADATA _score
+| FORK (EVAL query_embedding = TEXT_EMBEDDING("be excellent to each other", "test_dense_inference") | WHERE KNN(semantic_text_dense_field, query_embedding))
+       (EVAL query_embedding = TEXT_EMBEDDING("live long and prosper", "test_dense_inference") | WHERE KNN(semantic_text_dense_field, query_embedding))
+| KEEP semantic_text_field, query_embedding, _score, _fork
+| EVAL _score = ROUND(_score, 4)
+| SORT _score DESC
+| LIMIT 10
+;
+
+semantic_text_field:text                                              | query_embedding:dense_vector | _fork:keyword | _score:double
+be excellent to each other                                            | [45.0, 55.0, 54.0]           | fork1         | 1.0
+live long and prosper                                                 | [50.0, 57.0, 56.0]           | fork2         | 1.0
+be excellent to each other                                            | [50.0, 57.0, 56.0]           | fork2         | 0.0295
+live long and prosper                                                 | [45.0, 55.0, 54.0]           | fork1         | 0.0295
+all we have to decide is what to do with the time that is given to us | [45.0, 55.0, 54.0]           | fork1         | 0.0214
+all we have to decide is what to do with the time that is given to us | [50.0, 57.0, 56.0]           | fork2         | 0.0109
+;