Replace structured LLM dependency with Audita adapter

internal/framework/llm/client_common.go

@@ -0,0 +1,50 @@
+package llm
+
+import (
+	"fmt"
+	"net/http"
+	"reflect"
+	"strings"
+	"time"
+)
+
+func resolvedHTTPClient(base *http.Client, timeout time.Duration) *http.Client {
+	if base == nil {
+		if timeout <= 0 {
+			return http.DefaultClient
+		}
+		return &http.Client{Timeout: timeout}
+	}
+
+	if timeout <= 0 {
+		return base
+	}
+
+	cloned := *base
+	cloned.Timeout = timeout
+	return &cloned
+}
+
+func validateOutputTarget(out any) error {
+	if out == nil {
+		return fmt.Errorf("output target must not be nil")
+	}
+	value := reflect.ValueOf(out)
+	if value.Kind() != reflect.Ptr || value.IsNil() {
+		return fmt.Errorf("output target must be a non-nil pointer")
+	}
+	return nil
+}
+
+func sanitizeError(err error, apiKey string) error {
+	if err == nil {
+		return nil
+	}
+	msg := err.Error()
+	key := strings.TrimSpace(apiKey)
+	if key != "" {
+		msg = strings.ReplaceAll(msg, key, "[REDACTED]")
+		msg = strings.ReplaceAll(msg, "Bearer "+key, "Bearer [REDACTED]")
+	}
+	return fmt.Errorf("%s", msg)
+}