feat(multipart): Implement full multipart upload support with persistent manager, periodic cleanup, and API integration

ts/index.ts

@@ -44,6 +44,14 @@ export interface ILimitsConfig {
   requestTimeout?: number;
 }
 
+/**
+ * Multipart upload configuration
+ */
+export interface IMultipartConfig {
+  expirationDays?: number;
+  cleanupIntervalMinutes?: number;
+}
+
 /**
  * Server configuration
  */
@@ -71,6 +79,7 @@ export interface ISmarts3Config {
   cors?: ICorsConfig;
   logging?: ILoggingConfig;
   limits?: ILimitsConfig;
+  multipart?: IMultipartConfig;
 }
 
 /**
@@ -114,6 +123,10 @@ const DEFAULT_CONFIG: ISmarts3Config = {
     maxMetadataSize: 2048,
     requestTimeout: 300000, // 5 minutes
   },
+  multipart: {
+    expirationDays: 7,
+    cleanupIntervalMinutes: 60,
+  },
 };
 
 /**
@@ -145,6 +158,10 @@ function mergeConfig(userConfig: ISmarts3Config): Required<ISmarts3Config> {
       ...DEFAULT_CONFIG.limits!,
       ...(userConfig.limits || {}),
     },
+    multipart: {
+      ...DEFAULT_CONFIG.multipart!,
+      ...(userConfig.multipart || {}),
+    },
   };
 }