feat: update TestPrompt to specify output format for model name

Author: songquanpeng

common/config/config.go

@@ -163,4 +163,4 @@ var UserContentRequestProxy = env.String("USER_CONTENT_REQUEST_PROXY", "")
 var UserContentRequestTimeout = env.Int("USER_CONTENT_REQUEST_TIMEOUT", 30)
 
 var EnforceIncludeUsage = env.Bool("ENFORCE_INCLUDE_USAGE", false)
-var TestPrompt = env.String("TEST_PROMPT", "Print your model name exactly and do not output without any other text.")
+var TestPrompt = env.String("TEST_PROMPT", "Output only your specific model name with no additional text.")