新功能: 还原 v1/public/user/invite_sales 接口 + promo schema 修复迁移

- 还原 /v1/public/user/invite_sales 接口及 /invite/sales 别名（与 invite_records 并存）
  逻辑/handler/types 与 197fed7d 删除前版本完全一致，按 fefbd4f5 新 routes 结构注册
- 新增迁移 02155_promo_schema_fix: 幂等修复 subscribe_promo / order 列类型与索引偏差
- 同步 etc/ppanel.yaml 数据库连接配置
- 补齐相关需求与设计文档

apis/public/user.api

@@ -218,6 +218,22 @@ type (
 		Total int64          `json:"total"`
 		List  []InviteRecord `json:"list"`
 	}
+	GetInviteSalesRequest {
+		Page      int   `form:"page"`
+		Size      int   `form:"size"`
+		StartTime int64 `form:"start_time"`
+		EndTime   int64 `form:"end_time"`
+	}
+	InvitedUserSale {
+		Amount      float64 `json:"amount"`
+		UpdatedAt   int64   `json:"updated_at"`
+		UserHash    string  `json:"user_hash"`
+		ProductName string  `json:"product_name"`
+	}
+	GetInviteSalesResponse {
+		Total int64             `json:"total"`
+		List  []InvitedUserSale `json:"list"`
+	}
 	GetSubscribeStatusRequest {
 		Email string `form:"email" json:"email" validate:"omitempty,email"`
 	}
@@ -402,6 +418,10 @@ service ppanel {
 	@handler GetInviteRecords
 	get /invite_records (GetInviteRecordsRequest) returns (GetInviteRecordsResponse)
 
+	@doc "Get Invite Sales"
+	@handler GetInviteSales
+	get /invite_sales (GetInviteSalesRequest) returns (GetInviteSalesResponse)
+
 	@doc "Get Subscribe Status"
 	@handler GetSubscribeStatus
 	post /subscribe_status (GetSubscribeStatusRequest) returns (GetSubscribeStatusResponse)