Feat: Reputation Points System

[codebestia]

Summary

This PR Implements a reputation points system for user contributions.

1. IReputationService Interface

• Created IReputationService with methods for all reputation events
• Methods for comment upvotes/downvotes, report approvals, vulnerability additions, and ratings

2. ReputationService Implementation

• Implemented ReputationService with point values:
  • Comment upvote received: +5
  • Comment downvote received: -2
  • Report approved: +25
  • Vulnerability added (by severity):
    • Critical: +50
    • High: +30
    • Medium: +15
    • Low: +5
  • Rating/review posted: +10

3. Reputation History Logging

• Created ReputationHistoryModel to track all reputation changes
• Logs include: user ID, points change, new reputation, reason, and timestamp
• Added migration for the reputation_history table

4. Integration with Existing Services

• Updated ReportService to award reputation when reports are approved
• Updated VulnerabilityService to award reputation when vulnerabilities are approved
• Both services check if items were already approved to avoid duplicate awards

5. Background Job for Recalculation

• Added reputation recalculation to BackgroundWorkingHostedService
• Runs once per day to ensure data integrity
• Recalculates reputation for all users based on their contributions

6. Database Updates

• Added ReputationHistoryModel to the database context
• Created migration file for the new table
• UserProfile already has ReputationScore field (existing)

Notes:

• Comments and ratings are not yet implemented in the system, but the service has placeholder methods ready for when those features are added
• The recalculation method includes comments and ratings in its comments for future implementation

Related Issue

Closes #92

[codebestia]

GM @SurfingBowser
Please review

[codebestia]

@0xGeorgii Please review