Sphurthy taking over for Taariq: Add Lesson Plan Builder UI and update routes

[TaariqMansurie]

Description

This PR implements the backend API and database schemas for the "Assign Lesson Plan" feature. It introduces the endpoints required to assign lesson plan tasks to eligible students and logs the assignment history.
Implements # (PRIORITY HIGH) Phase 4 - Assign Lesson Plan - Backend API (WIP Taariq)

Related PRS (if any):

This backend PR is related to the frontend PR for the UI integration.
To test this backend PR, you need to checkout the corresponding frontend PR.
…

Main changes explained:

• Create models/educationTask.js for the schema defining assigned student tasks.
• Create models/lessonPlanLog.js for the schema tracking assignment and edit history.
• Create routes/educatorRouter.js for the /api/educator/assign-tasks endpoint (handles student eligibility and bulk task creation) and the /logs/:lessonPlanId endpoint.
• Update routes.js to register the new /api/educator routes.
  …

How to test:

1. check into current branch
2. do yarn install or npm install and start the local server
3. log in as an admin or educator user on the frontend (using the related frontend branch)
4. go to the Lesson Plan Builder page and trigger an assignment (manual or auto)
5. verify the API returns a 200 success response with the correct assigned/skipped counts
6. verify in the database (MongoDB) that new documents are created in the educationtasks and lessonplanlogs collections.

Screenshots or videos of changes:

Note:

CLOSED: Update PR: #2145

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[ManojPuttaswamy]

Both route handlers contain significant business logic directly in the router file — DB queries, task creation, logging, eligibility checks. This should be moved to educatorController

[ManojPuttaswamy]

If requestor is missing from the request body, this will throw a TypeError that falls through to the catch block and returns a 500 instead of a proper 400 validation error.

[Anusha-Gali]

Hi Taariq,

I have reviewed the mongoDB and the latest i can find in education tasks is dated for March 19 when today is March 18. Also upon refresh the subtask created by me does not appear again.

[sphurthy]

This PR has been redone in PR: #2145