implementation of Refactor of all business logic in gamification module

[shamoo53]

🔄 Refactor: Extract Business Logic from Gamification Module into Dedicated Providers
✅ Objective
Refactored the Daily Streak logic in the gamification module to follow NestJS best practices by enforcing separation of concerns and single responsibility, improving scalability, readability, and testability.

🧠 What Was Done

1. Analyzed Business Responsibilities
   Audited DailyStreakService and identified distinct business responsibilities:

updateStreak

getStreak

getStreakLeaderboard

checkAndAwardMilestones

buildStreakResponse

getStreakStats

2. Created Dedicated Provider Classes
   Extracted logic into focused, injectable services inside src/gamification/providers/:

UpdateStreakService

GetStreakService

GetStreakLeaderboardService

CheckAndAwardMilestonesService

BuildStreakResponseService

GetStreakStatsService

Each class handles only one concern, with appropriate dependency injection.

3. Refactored DailyStreakService
   Refactored to act as a delegator—no longer holds direct business logic. It now calls the relevant provider classes for operations.

4. Validated Controller Simplicity
   Confirmed StreakController contains no business logic and delegates solely to DailyStreakService. No changes needed.

5. Module Update
   Registered all new services in gamification.module.ts for proper injection.

6. Updated Unit Tests
   Refactored tests to support the new architecture.

Updated mocks and inputs (e.g., changed numeric userId to string).

Ensured all gamification tests pass with the new service breakdown.

7. Confirmed Architecture Integrity
   Manually verified that no business logic remains in any controller or event listener across the module.

📈 Result
✅ Separation of Concerns: Each service is now focused and independently testable.

✅ Maintainability: Easier to extend or debug individual features.

✅ NestJS-Compliant: Follows framework best practices for modularity and scalability.

✅ Improved Testability: Lighter unit testing with mockable dependencies.

✅ Cleaner Core Service: DailyStreakService is lean and easy to read.

[phertyameen]

Can you please pull the latest changes for ci/cd to checkout. Also minor adjustment hac been made that may have affected you logic. look into that also. This applies to both prs

[phertyameen]

LGTM