refs #737: preserve unmatched game mentions in query plan

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

@@ -245,6 +245,26 @@ class McpSseServiceTest {
         .contains("REPORT_UNSUPPORTED");
   }
 
+  @Test
+  void keepsUnmatchedMentionsInPartialGameQueryPlan() {
+    ObjectNode request = request(9, "tools/call");
+    ObjectNode params = (ObjectNode) request.putObject("params");
+    params.put("name", "oracle.select_ai.game_query_plan");
+    params.putObject("arguments")
+        .put("question", "supported game and unknown game");
+
+    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("\"status\" : \"PARTIAL\"")
+        .contains("\"gameKey\" : \"SUPPORTED_GAME\"")
+        .contains("\"mention\" : \"Unknown game\"")
+        .contains("\"reasonCode\" : \"NO_CATALOG_IDENTITY_MATCH\"");
+  }
+
   private ObjectNode request(int id, String method) {
     ObjectNode request = objectMapper.createObjectNode();
     request.put("jsonrpc", "2.0");
@@ -351,14 +371,40 @@ class McpSseServiceTest {
 
     @Override
     public Resolution resolve(String token, String question, int topK) {
-      return new Resolution("SINGLE_GAME", java.util.List.of(new GameCandidate(
+      GameCandidate supported = new GameCandidate(
           "SUPPORTED_GAME",
           "SUPPORTED_GAME_ID",
           "SUPPORTED_PREFIX",
           "Supported game",
           "Supported",
           0.1
-      )));
+      );
+      GameCandidate nearestUnknownCandidate = new GameCandidate(
+          "OTHER_GAME",
+          "OTHER_GAME_ID",
+          "OTHER_PREFIX",
+          "Other game",
+          "Other",
+          0.6
+      );
+      return new Resolution(
+          "MULTI_GAME",
+          java.util.List.of(supported),
+          java.util.List.of(
+              new MentionResolution(
+                  "Supported game",
+                  "MATCHED",
+                  supported,
+                  java.util.List.of(supported)
+              ),
+              new MentionResolution(
+                  "Unknown game",
+                  "UNMATCHED",
+                  null,
+                  java.util.List.of(nearestUnknownCandidate)
+              )
+          )
+      );
     }
   }
 }