AI rule node: ensure AI settings exist on rule node init

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/ai/TbAiNode.java

@@ -95,6 +95,10 @@ public final class TbAiNode extends TbAbstractExternalNode implements TbNode {
         );
 
         timeoutSeconds = config.getTimeoutSeconds();
+
+        if (!aiSettingsExist(ctx, config.getAiSettingsId())) {
+            throw new TbNodeException("[" + ctx.getTenantId() + "] AI settings with ID: " + config.getAiSettingsId() + " were not found", true);
+        }
         aiSettingsId = config.getAiSettingsId();
     }
 
@@ -105,6 +109,10 @@ public final class TbAiNode extends TbAbstractExternalNode implements TbNode {
         return responseFormatType == ResponseFormatType.JSON && jsonSchema != null ? Langchain4jJsonSchemaAdapter.fromJsonNode(jsonSchema) : null;
     }
 
+    private static boolean aiSettingsExist(TbContext ctx, AiSettingsId aiSettingsId) {
+        return ctx.getAiSettingsService().findAiSettingsByTenantIdAndId(ctx.getTenantId(), aiSettingsId).isPresent();
+    }
+
     @Override
     public void onMsg(TbContext ctx, TbMsg msg) throws TbNodeException {
         var ackedMsg = ackIfNeeded(ctx, msg);