Replace structured LLM dependency with Audita adapter

internal/framework/validators/llm_models.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"gitea.maximumdirect.net/eric/audita/internal/core/schema"
+	"gitea.maximumdirect.net/eric/audita/internal/framework/responseschema"
 )
 
 type LLMValidatorType string
@@ -22,9 +23,10 @@ type LLMMessage struct {
 }
 
 type StructuredCompletionRequest struct {
-	StageName string       `json:"stage_name"`
-	Messages  []LLMMessage `json:"messages"`
-	Model     string       `json:"model,omitempty"`
+	StageName      string                 `json:"stage_name"`
+	Messages       []LLMMessage           `json:"messages"`
+	Model          string                 `json:"model,omitempty"`
+	ResponseSchema *responseschema.Schema `json:"response_schema,omitempty"`
 }
 
 type StructuredCompletionResponse struct {