feat(sdk): 绑定时上报设备 log 到 update-metadata 并内聚双层绑定

- bind(userId:) 内聚为硬绑 + getVersion + 软绑 + updateMetadata 一次原子调用,
  软绑失败自动硬解绑回滚 + 清状态;集成方无需感知双层绑定
- fetchLatestFirmware 简化为对账上报 + checkUpgrade 两步,不再重复软绑
- VersionInfo 增加 log: [String: Any]?,走 JSONSerialization 解析(放弃 Codable);
  SDK 暴露只读 versionLog,断连/解绑/软绑回滚时清空
- ShipmentSnDeviceService 新增 updateMetadata(sn:data:),抽出 performPOST
  共享 HTTP 编排,新增 postAnyJSON 支持 [String: Any] body
- 老固件不返回 log → versionLog == nil → 自动跳过 updateMetadata,前向兼容

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Sources/DuooomiBleSDK/DuooomiBleSDK+Firmware.swift

@@ -7,17 +7,17 @@ import Foundation
 
 extension DuooomiBleSDK {
 
-    /// 拉取服务端最新固件信息。**内部串三步业务编排**（顺序固定）：
+    /// 拉取服务端最新固件信息。**内部串两步业务编排**（顺序固定）：
     ///
     /// 1. **对账上报**：把本地 pending `UpgradeRecord` 逐条报给服务端（容错失败，不阻断）
-    /// 2. **软绑**：POST `/api/auth/loomart/shipment-sn/device/bind`，登记云端绑定关系
-    ///    - 软绑失败 → 自动硬解绑（BLE 0x12）回滚 + 重置 `isActivated`/`sn`，整个 fetch 失败
-    /// 3. **拉服务端最新固件**：写入 `self.firmwareUpgrade`，通过 completion 回传
+    /// 2. **拉服务端最新固件**：写入 `self.firmwareUpgrade`，通过 completion 回传
+    ///
+    /// 软绑 / metadata 上报 / 硬绑失败回滚 → 已全部内聚到 `bind(userId:)`，本方法不再处理。
     ///
     /// - Parameters:
     ///   - sn: 设备序列号（bind 成功后从 `sdk.sn` 取）
     ///   - currentVersion: 设备当前固件版本（从 `sdk.version` 取）
-    ///   - userId: 当前用户 ID
+    ///   - userId: 当前用户 ID（写入对账上报的 failureReason）
     public func fetchLatestFirmware(
         sn: String,
         currentVersion: String,
@@ -34,41 +34,18 @@ extension DuooomiBleSDK {
         // Step 1: 对账上报历史 OTA 记录（容错失败，sn 级 in-flight 互斥）
         self.tryReportPendingUpgrade(sn: sn, currentVersion: currentVersion, userId: userId)
 
-        // Step 2: 软绑（shipment-sn HTTP）
-        // 失败 → 自动硬解绑（BLE 0x12）回滚 + 重置 isActivated/sn，保持云端 ↔ 本地状态一致；
-        // 整个 fetchLatestFirmware 失败回传，调用方收到错误后可重新走 bind 流程。
-        BleLog.d("Soft bind start: sn=\(sn)", "Firmware")
-        shipmentService.bind(sn: sn, bindUserId: userId) { [weak self] result in
+        // Step 2: 服务端 checkUpgrade
+        self.firmwareUpgradeService.checkUpgrade(sn: sn, currentVersion: currentVersion) { [weak self] result in
             guard let self = self else { return }
-            if case .failure(let err) = result {
-                BleLog.e("Soft bind failed during fetchLatestFirmware: \(err.localizedDescription); rolling back hard unbind", "Firmware")
-                // 硬解绑回滚（fire-and-forget；BLE ack 不影响这次 fetch 错误回传）
-                self.deviceInfoService.unbindDevice(userId: userId) { rollbackResult in
-                    if case .failure(let rbErr) = rollbackResult {
-                        BleLog.w("Hard unbind rollback failed (ignored): \(rbErr.localizedDescription)", "Firmware")
-                    } else {
-                        BleLog.i("Hard unbind rollback sent", "Firmware")
-                    }
+            switch result {
+            case .success(let r):
+                DispatchQueue.main.async {
+                    self.firmwareUpgrade = r
+                    completion(.success(r))
                 }
-                self.isActivated = false
-                self.sn = ""
+            case .failure(let err):
+                BleLog.w("checkUpgrade failed: \(err.localizedDescription)", "Firmware")
                 DispatchQueue.main.async { completion(.failure(err)) }
-                return
-            }
-            BleLog.i("Soft bind success: sn=\(sn)", "Firmware")
-
-            // Step 3: 服务端 checkUpgrade
-            self.firmwareUpgradeService.checkUpgrade(sn: sn, currentVersion: currentVersion) { result in
-                switch result {
-                case .success(let r):
-                    DispatchQueue.main.async {
-                        self.firmwareUpgrade = r
-                        completion(.success(r))
-                    }
-                case .failure(let err):
-                    BleLog.w("checkUpgrade failed: \(err.localizedDescription)", "Firmware")
-                    DispatchQueue.main.async { completion(.failure(err)) }
-                }
             }
         }
     }