implement user activity audit logging and enhance Swagger documentati…

[feyishola]

…on Add AuditLog entity

Summary

Describe what changed and why.

Linked Issue

Closes #

Type of Change

• feat
• fix
• docs
• refactor
• test
• chore

Validation

• Lint passed for affected area(s)
• Tests passed for affected area(s)
• Manual verification completed (if applicable)

Documentation

• Documentation updated (or N/A with explanation)
• Screenshots/videos attached for UI changes

Checklist

• Branch name uses feat/, fix/, or docs/
• Commit messages follow Conventional Commits
• PR scope matches linked issue acceptance criteria

Description
This PR implements a comprehensive audit logging system to track sensitive user actions for security and support purposes, and completes the Swagger API documentation.
Features Added

1. Audit Logging System
   New AuditLog entity storing: user ID, action type, timestamp, IP address, user agent, metadata, and status
   AuditService providing methods to log actions and query audit logs with filtering/pagination
   AuditController with endpoints:
   GET /audit/logs - Query all audit logs (admin/support)
   GET /audit/my-activity - Get current user's activity
   GET /audit/my-activity/recent - Get recent activity for current user
2. Tracked User Actions
   LOGIN / LOGIN_FAILED - Email/password and Stellar wallet authentication
   LOGOUT - Single device and all devices logout
   PROFILE_UPDATE - User profile changes
   ACCOUNT_LINK / ACCOUNT_UNLINK - Stellar account management
3. Swagger Documentation
   Added comprehensive Swagger decorators to ProfileResponseDto
   Verified all existing controllers and DTOs have proper Swagger documentation
   Files Changed
   New: src/audit/ module (entity, DTOs, service, controller, module)
   Modified: src/app.module.ts, src/auth/auth.module.ts, src/auth/auth.controller.ts
   Modified: src/users/users.module.ts, src/users/users.controller.ts, src/users/dto/profile-response.dto.ts
   Modified: src/users/users.controller.spec.ts (updated tests)
   Testing
   All 130 tests pass
   Build completes successfully
   Manual verification of audit log creation on login/logout/profile update

closes #490

closes #492

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[Cedarich]

Please fix workflow