feat: Implement loyalty and wholesale services with models, routes, and validation

- Added models for loyalty points allocation, redemption, rewards, tiers, tier history, and referrals.
- Created business credit ledger entries, settlements, and settlement items models.
- Developed services for loyalty operations including account management, point allocation, redemption, and referral handling.
- Implemented wholesale credit management services for transactions and settlements.
- Established routes for loyalty and wholesale admin and customer operations with appropriate middleware for authentication and permission checks.
- Introduced validation schemas for loyalty and wholesale operations.
- Set up cron jobs for loyalty reconciliation tasks such as birthday rewards and point expirations.
- Created migration scripts to set up the database schema for loyalty and wholesale features.
- Added unit tests for validation and policy enforcement in loyalty and wholesale services.

app/controllers/wholesale/admin.controller.js

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+const db=require("../../models"),credit=require("../../services/wholesale/credit.service"),settlements=require("../../services/wholesale/settlement.service"),{logActivity}=require("../../services/activity.service");exports.credit=async(req,res,next)=>{try{if(!req.get("Idempotency-Key"))throw Object.assign(new Error("Idempotency-Key is required"),{status:400,code:"IDEMPOTENCY_KEY_REQUIRED"});const result=await credit.post({...req.body,currency:req.body.currency.toUpperCase(),eventId:`CREDIT:${req.get("Idempotency-Key")}`,actorUserId:req.user.id});await logActivity({user:req.user,type:`CREDIT_${req.body.type}`,module:"Wholesale",targetId:result.entry.id,requestId:req.id});res.status(result.idempotent?200:201).json({success:true,data:result});}catch(e){next(e);}};exports.creditHistory=async(req,res,next)=>{try{res.json({success:true,data:await db.BusinessCreditLedgerEntry.findAll({where:{business_customer_id:req.params.businessId},order:[["occurred_at","DESC"]],limit:200})});}catch(e){next(e);}};exports.generate=async(req,res,next)=>{try{const result=await settlements.generate({...req.body,currency:req.body.currency.toUpperCase()});res.status(result.idempotent?200:201).json({success:true,data:result.settlement});}catch(e){next(e);}};exports.settlements=async(req,res,next)=>{try{res.json({success:true,data:await db.BusinessSettlement.findAll({order:[["period_end","DESC"]]})});}catch(e){next(e);}};exports.action=to=>async(req,res,next)=>{try{res.json({success:true,data:await settlements.transition(req.params.id,to,req.user.id)});}catch(e){next(e);}};

app/controllers/wholesale/creditPurchase.controller.js

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+const service=require("../../services/wholesale/creditPurchase.service"),{logActivity}=require("../../services/activity.service");exports.purchase=async(req,res,next)=>{try{const key=req.get("Idempotency-Key");if(!key)throw Object.assign(new Error("Idempotency-Key is required"),{status:400,code:"IDEMPOTENCY_KEY_REQUIRED"});const result=await service.purchase({orderId:req.params.id,userId:req.user.id,eventId:`CREDIT:ORDER:${key}`});if(!result.idempotent)await logActivity({user:req.user,type:"CREDIT_CAPTURED",module:"Wholesale",targetId:result.credit.entry.id,requestId:req.id});res.status(result.idempotent?200:201).json({success:true,data:{orderId:result.order.id,paymentStatus:result.order.payment_status,credit:result.credit}});}catch(e){next(e);}};

app/controllers/wholesale/customer.controller.js

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+const{QueryTypes}=require("sequelize"),db=require("../../models"),money=require("../../services/pricing/money");async function business(userId){const row=await db.BusinessCustomer.findOne({where:{user_id:userId,status:"ACTIVE"}});if(!row)throw Object.assign(new Error("Active business account required"),{status:403,code:"BUSINESS_REQUIRED"});return row;}exports.dashboard=async(req,res,next)=>{try{const b=await business(req.user.id),credit=await db.BusinessCreditAccount.findOne({where:{business_profile_id:b.business_customer_id}}),last=credit&&await db.BusinessCreditLedgerEntry.findOne({where:{business_credit_account_id:credit.id},order:[["occurred_at","DESC"]]}),used=last?String(last.balance_after):"0.00",tier=b.business_tier_id&&await db.BusinessTier.findByPk(b.business_tier_id),settlement=await db.BusinessSettlement.findOne({where:{business_customer_id:b.business_customer_id,status:["ISSUED","PARTIALLY_PAID","OVERDUE"]},order:[["due_date","ASC"]]}),stats=(await db.sequelize.query("SELECT COALESCE(SUM(grand_total),0) AS lifetimeVolume, COALESCE(SUM(CASE WHEN placed_at >= DATE_FORMAT(UTC_DATE(), '%Y-%m-01') THEN grand_total ELSE 0 END),0) AS monthlyVolume, COALESCE(SUM(discount_total),0) AS discountTotal, COALESCE(SUM(subtotal),0) AS subtotalTotal FROM orders WHERE business_customer_id = :id AND payment_status = 'PAID'",{replacements:{id:b.business_customer_id},type:QueryTypes.SELECT}))[0];res.json({success:true,data:{partnerId:b.partnerId,tier:tier&&{code:tier.code,name:tier.name},credit:credit&&{status:credit.status,currency:credit.currency,limit:String(credit.credit_limit),used,available:money.subtractFloor(credit.credit_limit,used)},monthlyVolume:String(stats.monthlyVolume),lifetimeVolume:String(stats.lifetimeVolume),discountTotal:String(stats.discountTotal),subtotalTotal:String(stats.subtotalTotal),nextSettlement:settlement&&{number:settlement.settlement_number,dueDate:settlement.due_date,balanceDue:String(settlement.balance_due)}}});}catch(e){next(e);}};exports.credit=async(req,res,next)=>{try{const b=await business(req.user.id),account=await db.BusinessCreditAccount.findOne({where:{business_profile_id:b.business_customer_id}}),rows=account?await db.BusinessCreditLedgerEntry.findAll({where:{business_credit_account_id:account.id},order:[["occurred_at","DESC"]],limit:100}):[];res.json({success:true,data:rows});}catch(e){next(e);}};exports.settlements=async(req,res,next)=>{try{const b=await business(req.user.id);res.json({success:true,data:await db.BusinessSettlement.findAll({where:{business_customer_id:b.business_customer_id},order:[["period_end","DESC"]]})});}catch(e){next(e);}};exports.settlement=async(req,res,next)=>{try{const b=await business(req.user.id),row=await db.BusinessSettlement.findOne({where:{id:req.params.id,business_customer_id:b.business_customer_id}});if(!row)throw Object.assign(new Error("Settlement not found"),{status:404,code:"NOT_FOUND"});res.json({success:true,data:row});}catch(e){next(e);}};exports.orders=async(req,res,next)=>{try{const b=await business(req.user.id);res.json({success:true,data:await db.Order.findAll({where:{business_customer_id:b.business_customer_id},order:[["createdAt","DESC"]],limit:20})});}catch(e){next(e);}};