Add runtime restore and temp asset cleanup

apps/api/internal/config/config.go

@@ -4,6 +4,7 @@ import (
 	"log/slog"
 	"net/url"
 	"os"
+	"strconv"
 	"strings"
 )
 
@@ -23,6 +24,7 @@ type Config struct {
 	PublicBaseURL                   string
 	LocalGeneratedStorageDir        string
 	LocalUploadedStorageDir         string
+	LocalTempAssetTTLHours          int
 	TaskProgressCallbackEnabled     bool
 	TaskProgressCallbackURL         string
 	TaskProgressCallbackTimeoutMS   string
@@ -49,6 +51,7 @@ func Load() Config {
 		PublicBaseURL:               strings.TrimRight(env("AI_GATEWAY_PUBLIC_BASE_URL", env("PUBLIC_BASE_URL", "")), "/"),
 		LocalGeneratedStorageDir:    env("AI_GATEWAY_GENERATED_STORAGE_DIR", env("LOCAL_GENERATED_STORAGE_DIR", env("AI_GATEWAY_STATIC_STORAGE_DIR", DefaultLocalGeneratedStorageDir))),
 		LocalUploadedStorageDir:     env("AI_GATEWAY_UPLOADED_STORAGE_DIR", env("LOCAL_UPLOADED_STORAGE_DIR", DefaultLocalUploadedStorageDir)),
+		LocalTempAssetTTLHours:      envInt("AI_GATEWAY_LOCAL_TEMP_ASSET_TTL_HOURS", 24),
 		TaskProgressCallbackEnabled: env("TASK_PROGRESS_CALLBACK_ENABLED", "true") == "true",
 		TaskProgressCallbackURL: env("TASK_PROGRESS_CALLBACK_URL",
 			strings.TrimRight(env("SERVER_MAIN_BASE_URL", "http://localhost:3000"), "/")+"/internal/platform/task-progress-callbacks",
@@ -136,6 +139,18 @@ func env(key string, fallback string) string {
 	return fallback
 }
 
+func envInt(key string, fallback int) int {
+	value := envValue(key)
+	if value == "" {
+		return fallback
+	}
+	parsed, err := strconv.Atoi(value)
+	if err != nil {
+		return fallback
+	}
+	return parsed
+}
+
 func logLevel(value string) slog.Level {
 	switch strings.ToLower(value) {
 	case "debug":