fix(mining-admin-service): 修复 APK 解析和添加 AppVersion migration

1. 修复 package-parser.service.ts:
   - ApkReader.open 需要文件路径，改为先写入临时文件再解析
   - 添加 fs/path/os 模块导入
   - 完成后自动清理临时文件

2. 添加 AppVersion 表 migration:
   - 创建 Platform 枚举类型 (ANDROID, IOS)
   - 创建 app_versions 表
   - 添加必要索引

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/mining-admin-service/prisma/migrations/20260129_add_app_versions/migration.sql

@@ -0,0 +1,31 @@
+-- CreateEnum
+CREATE TYPE "Platform" AS ENUM ('ANDROID', 'IOS');
+
+-- CreateTable
+CREATE TABLE "app_versions" (
+    "id" TEXT NOT NULL,
+    "platform" "Platform" NOT NULL,
+    "version_code" INTEGER NOT NULL,
+    "version_name" TEXT NOT NULL,
+    "build_number" TEXT NOT NULL,
+    "download_url" TEXT NOT NULL,
+    "file_size" BIGINT NOT NULL,
+    "file_sha256" TEXT NOT NULL,
+    "min_os_version" TEXT,
+    "changelog" TEXT NOT NULL,
+    "is_force_update" BOOLEAN NOT NULL DEFAULT false,
+    "is_enabled" BOOLEAN NOT NULL DEFAULT true,
+    "release_date" TIMESTAMP(3),
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+    "created_by" TEXT NOT NULL,
+    "updated_by" TEXT,
+
+    CONSTRAINT "app_versions_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "app_versions_platform_is_enabled_idx" ON "app_versions"("platform", "is_enabled");
+
+-- CreateIndex
+CREATE INDEX "app_versions_platform_version_code_idx" ON "app_versions"("platform", "version_code");

backend/services/mining-admin-service/src/infrastructure/parsers/package-parser.service.ts

@@ -1,5 +1,8 @@
 import { Injectable, Logger } from '@nestjs/common'
 import { Platform } from '../../domain/version-management'
+import * as fs from 'fs'
+import * as path from 'path'
+import * as os from 'os'
 
 export interface ParsedPackageInfo {
   packageName: string
@@ -28,10 +31,17 @@ export class PackageParserService {
   }
 
   private async parseApk(buffer: Buffer): Promise<ParsedPackageInfo | null> {
+    // ApkReader 需要文件路径，所以先保存到临时文件
+    const tempDir = os.tmpdir()
+    const tempFile = path.join(tempDir, `apk_${Date.now()}_${Math.random().toString(36).slice(2)}.apk`)
+
     try {
+      // 写入临时文件
+      fs.writeFileSync(tempFile, buffer)
+
       // 动态导入 adbkit-apkreader
       const ApkReader = await import('adbkit-apkreader')
-      const reader = await ApkReader.default.open(buffer)
+      const reader = await ApkReader.default.open(tempFile)
       const manifest = await reader.readManifest()
 
       return {
@@ -44,6 +54,15 @@ export class PackageParserService {
     } catch (error) {
       this.logger.error('Failed to parse APK:', error)
       return null
+    } finally {
+      // 清理临时文件
+      try {
+        if (fs.existsSync(tempFile)) {
+          fs.unlinkSync(tempFile)
+        }
+      } catch (e) {
+        this.logger.warn('Failed to cleanup temp APK file:', e)
+      }
     }
   }