fix

Author: peachisai

apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/tag/Tags.java

@@ -238,7 +238,7 @@ public static final class HTTP {
     /**
      * GEN_AI_STREAM_TTFR represents the time to first response (TTFR) for streaming operations.
      */
-    public static final StringTag GEN_AI_STREAM_TIME_TO_FIRST_TOKEN = new StringTag(40, "gen_ai.server.time_to_first_token");
+    public static final StringTag GEN_AI_SERVER_TIME_TO_FIRST_TOKEN = new StringTag(40, "gen_ai.server.time_to_first_token");
 
     /**
      * GEN_AI_INPUT_MESSAGES represents the chat history provided to the model as an input.

apm-sniffer/apm-sdk-plugin/spring-plugins/spring-ai-1.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/spring/ai/v1/ChatModelStreamInterceptor.java

@@ -150,7 +150,7 @@ private void recordTtfrIfFirstToken(AbstractSpan span, Generation generation, St
             return;
         }
         if (state.firstResponseReceived.compareAndSet(false, true)) {
-            Tags.GEN_AI_STREAM_TIME_TO_FIRST_TOKEN.set(span, String.valueOf(System.currentTimeMillis() - state.startTime));
+            Tags.GEN_AI_SERVER_TIME_TO_FIRST_TOKEN.set(span, String.valueOf(System.currentTimeMillis() - state.startTime));
         }
     }