Replace structured LLM dependency with Audita adapter

internal/framework/proposal_generation/generate.go

@@ -14,6 +14,7 @@ import (
 	"gitea.maximumdirect.net/eric/audita/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/audita/internal/framework/llm"
 	"gitea.maximumdirect.net/eric/audita/internal/framework/proposals"
+	"gitea.maximumdirect.net/eric/audita/internal/framework/responseschema"
 )
 
 // InteractionDiagnosticsWriter writes machine-readable prompt/response artifacts.
@@ -112,11 +113,13 @@ func GenerateCandidates(ctx context.Context, req Request) (Result, error) {
 		callErr   error
 		artifacts InteractionArtifacts
 	)
+	responseSchema := responseschema.MustLookup(responseschema.CorrectionSetKey)
 	call := func(callCtx context.Context) error {
 		_, callErr = req.LLMClient.CompleteStructured(callCtx, contracts.StructuredCompletionRequest{
-			StageName: stage,
-			Messages:  messages,
-			Model:     model,
+			StageName:      stage,
+			Messages:       messages,
+			Model:          model,
+			ResponseSchema: &responseSchema,
 		}, &response)
 		return callErr
 	}
@@ -126,17 +129,20 @@ func GenerateCandidates(ctx context.Context, req Request) (Result, error) {
 		callErr = call(ctx)
 	}
 
+	requestMetadata := map[string]any{
+		"module_key":         req.ModuleKey,
+		"module_instance":    req.ModuleInstance,
+		"replacement_policy": req.ReplacementPolicy,
+		"section":            req.Section,
+		"start_index":        req.StartIndex,
+		"model":              model,
+	}
+	requestMetadata["response_schema"] = schemaMetadata(responseSchema)
+
 	if writer != nil {
 		artifacts, _ = writer.WriteInteraction(
 			stage,
-			map[string]any{
-				"module_key":         req.ModuleKey,
-				"module_instance":    req.ModuleInstance,
-				"replacement_policy": req.ReplacementPolicy,
-				"section":            req.Section,
-				"start_index":        req.StartIndex,
-				"model":              model,
-			},
+			requestMetadata,
 			map[string]any{
 				"messages": messages,
 			},
@@ -185,6 +191,15 @@ func GenerateCandidates(ctx context.Context, req Request) (Result, error) {
 	}, nil
 }
 
+func schemaMetadata(schema responseschema.Schema) map[string]any {
+	return map[string]any{
+		"id":      schema.ID,
+		"version": schema.Version,
+		"name":    schema.Name,
+		"sha256":  schema.SHA256,
+	}
+}
+
 func buildStageName(moduleInstance string, section *contracts.SectionMetadata) string {
 	base := fmt.Sprintf("%s:proposal-generation", moduleInstance)
 	if section == nil {