Link user information to activity scores and group users by status - #131

[bkarimii]

Description

This pull request refactors and extends the user activity scoring and status classification logic to improve data traceability and enable admin insights. Key changes include:

• Refactored scoreNormaliser:

Now returns an array of user objects with userId, name, email, and their normalised score.

Keeps the score calculation logic intact, but improves readability and traceability.

• Enhanced decideStatus:

Instead of just returning counts, it now groups users into inactive, low, medium, and high activity levels.

Each group contains the full user object (with ID, name, email, and score).

• Updated /users/status-counts endpoint:

Returns statusCounts, usersByStatus, and boxPlotData in a single response.

Enables frontend tools to display user names/emails under each activity level.

Related to

Fixes #131

Checklist:

• My code follows the style guidelines of this project
• I have carefully reviewed my own code
• I have commented my code
• I have updated any documentation