[Backend] Implement Metrics Averaging GitHub Workflow

[samarth52]

Context

BEI wants to see patients' average gameplay statistics over the weeks. However, our routes only increment the game session statistics for a given week. We need a script that runs at the end of every week and averages out that week's statistics based on the number of sessions the users completed.

Work on #8 before this.

Requirements

GitHub Workflow to Schedule Metrics Averaging Jobs

Create a GitHub workflow /.github/workflows/average-metrics.yaml. It should have the following specifications:

• Name: "Average Metrics"
• Trigger:
  • Should be scheduled to run every Monday at 12:00 AM EDT
  • Add a second trigger such that it can be ran manually as well
• It should create a job that runs on ubuntu-latest. The steps are as follow:
  • Checkout (actions/checkout@v4)
  • POST request to https://brain-exercise-initiative-analytics.netlify.app/api/patient/internal/average-stats, attaching our GitHub environment variable called INTERNAL_AVERAGE_SECRET to the body of this request (this will have the same value as process.env.INTERNAL_AVERAGE_SECRET.
  • This job should fail if the POST request's body has success = false.

For testing purposes, create a PR for #8 once you finish and test the route. Use the preview URL from this PR in the POST request of the workflow.

Acceptance Criteria

• The GitHub workflow runs every Monday at 12:00 AM EDT
• The GitHub workflow has a manual trigger
• The GitHub workflow sends a POST request to the route created in this PR
• The GitHub workflow fails if the POST request's response contains success = false