代喂改走真实订单，并补上打卡纪律与地址明文清除

支付原来是个占位：调一下接口任务就算"已付"。现在任务和喂养者保证金都
走会员那套订单与支付网关，一笔订单买到什么由 applyPaidOrderTx 统一决定，
沙箱和真实回调走同一段逻辑。退款能释放托管中的任务，但不会去动已经结算
的那一笔——钱已经在喂养者账上，那种情况必须有人看过再说。

通道接通之前，客服可以在管理端手工标记已托管，必须写明钱怎么收的，进审计日志。

另外补上三件方案里写了但代码没做的事：打卡必须按到达、喂食、离开的顺序，
喂食离到达太近视为摆拍；地址新增紧急联系人与常去医院，随门牌一起只发给
被选中的喂养者；任务结束七天后由后台任务抹掉地址明文，只留城市与街道。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

im/backend/internal/app/app.go

@@ -118,6 +118,7 @@ func (a *App) Run() {
 	go a.runAIMaintenance(workerContext)
 	go a.runChatMediaCleanupWorker(workerContext)
 	a.startFeedSettlementWorker(workerContext)
+	a.startAddressPurgeWorker(workerContext)
 	server := rest.MustNewServer(rest.RestConf{
 		Host:     a.config.Host,
 		Port:     a.config.Port,
@@ -267,7 +268,8 @@ func (a *App) userRoutes() []rest.Route {
 		{Method: http.MethodGet, Path: "/api/v1/pet/feed-tasks", Handler: auth(a.feedTasks)},
 		{Method: http.MethodPost, Path: "/api/v1/pet/feed-tasks", Handler: auth(a.createFeedTask)},
 		{Method: http.MethodGet, Path: "/api/v1/pet/feed-tasks/:id", Handler: auth(a.feedTaskDetail)},
-		{Method: http.MethodPost, Path: "/api/v1/pet/feed-tasks/:id/pay", Handler: auth(a.escrowFeedTask)},
+		{Method: http.MethodPost, Path: "/api/v1/pet/feed-tasks/:id/order", Handler: auth(a.createFeedTaskOrder)},
+		{Method: http.MethodPost, Path: "/api/v1/pet/sitter/deposit", Handler: auth(a.createDepositOrder)},
 		{Method: http.MethodPost, Path: "/api/v1/pet/feed-tasks/:id/apply", Handler: auth(a.applyFeedTask)},
 		{Method: http.MethodPost, Path: "/api/v1/pet/feed-tasks/:id/assign", Handler: auth(a.assignFeedTask)},
 		{Method: http.MethodPost, Path: "/api/v1/pet/feed-tasks/:id/confirm", Handler: auth(a.confirmFeedTask)},
@@ -371,6 +373,7 @@ func (a *App) adminRoutes() []rest.Route {
 		{Method: http.MethodGet, Path: "/admin/v1/pet/sitters", Handler: permit("users:view", a.adminSitters)},
 		{Method: http.MethodPost, Path: "/admin/v1/pet/sitters/:id/review", Handler: permit("users:manage", a.adminReviewSitter)},
 		{Method: http.MethodGet, Path: "/admin/v1/pet/feed-tasks", Handler: permit("users:view", a.adminFeedTasks)},
+		{Method: http.MethodPost, Path: "/admin/v1/pet/feed-tasks/:id/escrow", Handler: permit("users:manage", a.adminEscrowFeedTask)},
 		{Method: http.MethodGet, Path: "/admin/v1/pet/disputes", Handler: permit("users:view", a.adminFeedDisputes)},
 		{Method: http.MethodPost, Path: "/admin/v1/pet/disputes/:id/handle", Handler: permit("users:manage", a.adminHandleFeedDispute)},
 		{Method: http.MethodGet, Path: "/admin/v1/wallet/withdrawals", Handler: permit("users:view", a.adminWithdrawals)},