Feature/cuasa audit system

[SatyamPandey-07]

1. Auditing Core & Intelligence
   backend/models/audit_log.py
   : A high-fidelity schema for recording security events, including differential value analysis (JSON diffs), gravity scores, and risk levels. It also includes
   UserSession
   tracking for session management.
   backend/services/audit_service.py
   : The "brain" of the audit system. Features include:
   Threat Detection: Heuristics for detecting brute-force attacks, SQL injection patterns, and automated sensitive operations.
   Forensic Analysis: Multi-vector search capabilities for security investigations.
   Behavioral Tracking: Anomaly detection by comparing current activity against historical user norms.
   Compliance Export: Generates encrypted audit trails in JSON/CSV formats.

2. Middleware & Integration
   backend/middleware/audit.py
   : Global middleware that intercepting all state-changing requests (POST, PUT, DELETE) and sensitive paths. It also provides an @audit_request decorator for granular control over critical endpoints.
   app.py
   : Registered the audit middleware globally and initialized the system-wide tracking.
   Security Integration: Refactored
   security_utils.py
   and
   auth_utils.py
   to route all security events through the unified audit registry.

3. Module-Specific Auditing
   Authentication (
   auth.py
   ): Audits registrations, password resets, and email verifications.
   Financial & Market (
   market.py
   ,
   loan.py
   ): Tracks market watchlist updates, manual price refreshes, and AI-driven loan eligibility checks.
   Community (
   forum.py
   ): Audits thread creation, moderation actions (flagging), and category management.
   Asset Management (
   assets.py
   ): Records high-value transactions like asset registration, failure predictions, and retirement.

4. Administrative Interface & Automation
   audit_dashboard.html
   : A premium, real-time monitoring interface for admins featuring:
   Live interaction statistics (24h).
   Threat detection alerts with pulse animations.
   Dynamic risk distribution charts (Chart.js).
   Forensic log stream with risk-level badging.
   backend/tasks/audit_tasks.py
   : Celery tasks for automated session purging, daily forensic reporting, and audit log rotation (retention management).

closes #1460

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[omroy07]

Conflict

[SatyamPandey-07]

No conflicts with base branch
Changes can be cleanly merged.

@omroy07

[github-actions]

🎉 Congrats @SatyamPandey-07 on getting your PR merged! 🙌
Thanks for the contribution — looking forward to more from you 🚀