refs #735: add few-shot NL2SQL MCP tool

src/test/java/com/cloudhandson/vpdbackoffice/service/McpSseServiceTest.java

@@ -37,7 +37,10 @@ class McpSseServiceTest {
           "테스트 질문에 사용할 예제 SQL을 조회합니다.",
           "oracle.select_ai.test_qa_vector_store",
           "테스트 예제 SQL 저장",
-          "테스트 예제 SQL을 저장합니다."
+          "테스트 예제 SQL을 저장합니다.",
+          "oracle.select_ai.test_fewshot_nl2sql",
+          "테스트 Few-shot NL2SQL",
+          "테스트 Few-shot 검색 및 실행 도구입니다."
       ),
       qaVectorService
   );
@@ -47,7 +50,7 @@ class McpSseServiceTest {
     ObjectNode response = service.handle("default", request(1, "tools/list"));
 
     var tools = response.path("result").path("tools");
-    assertThat(tools).hasSize(4);
+    assertThat(tools).hasSize(5);
     var selectAi = tools.get(0);
     assertThat(selectAi.path("name").asText()).isEqualTo("oracle.select_ai.test_data_text2sql");
     assertThat(selectAi.path("description").asText()).contains("SGMP_POC_OCI_GPT54MINI");
@@ -82,6 +85,11 @@ class McpSseServiceTest {
     assertThat(vectorStore.path("inputSchema").path("required"))
         .extracting(node -> node.asText())
         .contains("question", "answerSql");
+
+    var fewShot = tools.get(4);
+    assertThat(fewShot.path("name").asText())
+        .isEqualTo("oracle.select_ai.test_fewshot_nl2sql");
+    assertThat(fewShot.path("description").asText()).contains("Few-shot");
   }
 
   @Test
@@ -128,6 +136,24 @@ class McpSseServiceTest {
         .contains("RESULT");
   }
 
+  @Test
+  void callsDedicatedFewShotNl2SqlToolWithGeneratedSqlAndExecutionResult() {
+    ObjectNode request = request(7, "tools/call");
+    ObjectNode params = (ObjectNode) request.putObject("params");
+    params.put("name", "oracle.select_ai.test_fewshot_nl2sql");
+    params.putObject("arguments").put("prompt", "카제나 AU를 조회해 줘");
+
+    ObjectNode response = service.handle("default", request, "user-bearer");
+
+    assertThat(response.path("result").path("isError").asBoolean()).isFalse();
+    String payload = response.path("result").path("content").get(0).path("text").asText();
+    assertThat(payload)
+        .contains("oracle.select_ai.test_fewshot_nl2sql")
+        .contains("SHOWSQL_AND_EXECUTED")
+        .contains("generatedSql")
+        .contains("READ_ONLY_EXECUTED");
+  }
+
   @Test
   void returnsToolLevelDeniedResultWhenVpdTokenIsMissing() {
     ObjectNode request = request(3, "tools/call");