Add RAG client

target/surefire-reports/com.example.service.llm.LlmResponseTunerServiceImplTest.txt

@@ -0,0 +1,35 @@
+-------------------------------------------------------------------------------
+Test set: com.example.service.llm.LlmResponseTunerServiceImplTest
+-------------------------------------------------------------------------------
+Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.301 s <<< FAILURE! -- in com.example.service.llm.LlmResponseTunerServiceImplTest
+com.example.service.llm.LlmResponseTunerServiceImplTest.setValue_shouldSetValueInRedis -- Time elapsed: 0.295 s <<< ERROR!
+org.mockito.exceptions.misusing.PotentialStubbingProblem: 
+
+Strict stubbing argument mismatch. Please check:
+ - this invocation of 'set' method:
+    reactiveValueOperations.set(
+    "llm-pre-response:test_key",
+    "test_value",
+    PT1H
+);
+    -> at com.example.service.llm.LlmResponseTunerServiceImpl.setValue(LlmResponseTunerServiceImpl.java:31)
+ - has following stubbing(s) with different arguments:
+    1. reactiveValueOperations.set(
+    "llm-pre-response:test_key",
+    "test_value"
+);
+      -> at com.example.service.llm.LlmResponseTunerServiceImplTest.setValue_shouldSetValueInRedis(LlmResponseTunerServiceImplTest.java:52)
+Typically, stubbing argument mismatch indicates user mistake when writing tests.
+Mockito fails early so that you can debug potential problem easily.
+However, there are legit scenarios when this exception generates false negative signal:
+  - stubbing the same method multiple times using 'given().will()' or 'when().then()' API
+    Please use 'will().given()' or 'doReturn().when()' API for stubbing.
+  - stubbed method is intentionally invoked with different arguments by code under test
+    Please use default or 'silent' JUnit Rule (equivalent of Strictness.LENIENT).
+For more information see javadoc for PotentialStubbingProblem class.
+	at com.example.service.llm.LlmResponseTunerServiceImpl.setValue(LlmResponseTunerServiceImpl.java:31)
+	at com.example.service.llm.LlmResponseTunerServiceImplTest.setValue_shouldSetValueInRedis(LlmResponseTunerServiceImplTest.java:54)
+	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
+	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
+	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
+