storing the assigned on date and time when am is assigned to host

prisma/schema.prisma

@@ -680,6 +680,7 @@ model HostHeader {
   agreementAccepted       Boolean           @default(false) @map("agreement_accepted")
   accountManagerXid       Int?              @map("account_manager_xid")
   accountManager          User?             @relation("AccountManager", fields: [accountManagerXid], references: [id], onDelete: Restrict)
+  assignedOn              DateTime?         @map("assigned_on")
   isApproved              Boolean           @default(false) @map("is_approved")
   agreementStartDate      DateTime?         @map("agreement_start_date")
   durationNumber          Int?              @map("duration_number")

src/modules/minglaradmin/services/minglar.service.ts

@@ -492,7 +492,7 @@ export class MinglarService {
         id: true,
         hostStatusDisplay: true,
         createdAt: true,
-        companyName:true,
+        companyName: true,
         user: {
           select: {
             id: true,
@@ -598,6 +598,7 @@ export class MinglarService {
       where: { id: hostXid },
       data: {
         accountManagerXid: accountManagerXid,
+        assignedOn: new Date(),
         hostStatusInternal: HOST_STATUS_INTERNAL.HOST_SUBMITTED,
         hostStatusDisplay: HOST_STATUS_DISPLAY.UNDER_REVIEW,
         adminStatusInternal: MINGLAR_STATUS_INTERNAL.AM_TO_REVIEW,