fix: remove required tag for LLMGetNumTokensResponse

internal/types/entities/model_entities/llm.go

@@ -204,5 +204,5 @@ type LLMResultChunkDelta struct {
 }
 
 type LLMGetNumTokensResponse struct {
-	NumTokens int `json:"num_tokens" validate:"required"`
+	NumTokens int `json:"num_tokens"`
 }