added two layers of task sorting. one at db retrieval and one at the time of sending

Co-authored-by: Copilot <copilot@github.com>

Author: Rowanssss

src/backend/src/services/notifications.services.ts

@@ -44,6 +44,9 @@ export default class NotificationsService {
         },
         dateDeleted: null
       },
+      orderBy: {
+        deadline: 'asc' // earliest (most overdue) first
+      },
       include: {
         assignees: {
           include: {
@@ -63,7 +66,7 @@ export default class NotificationsService {
 
     const teamTaskMap = new Map<string, TaskWithAssignees[]>();
 
-    // group tasks due by team in a map
+    // group tasks due by team
     tasks.forEach((task) => {
       const teamSlackIds = task.wbsElement.project?.teams.map((team) => team.slackId) ?? [];
 
@@ -78,9 +81,10 @@ export default class NotificationsService {
       });
     });
 
-    // send the notifications to each team for their respective tasks
+    // send the notifications to each team for their respective tasks sorted by deadline
     const promises = Array.from(teamTaskMap).map(async ([slackId, tasks]) => {
       const messageBlock = tasks
+        .sort((a, b) => a.deadline!.getTime() - b.deadline!.getTime())
         .map((task) => {
           // prisma call earlier allows the forced unwrap (deadline is guaranteed to be a non-null value)
           const todayMidnightUTC = new Date(new Date().setUTCHours(0, 0, 0, 0));
@@ -236,7 +240,6 @@ export default class NotificationsService {
   static async sendSponsorTaskNotifications() {
     const startOfToday = new Date(new Date().setUTCHours(0, 0, 0, 0));
     const endOfToday = startOfDayTomorrow();
-
     const sponsorTasks = await prisma.sponsor_Task.findMany({
       where: {
         notifyDate: {