chore: Major repository cleanup - remove 273+ obsolete files

This commit removes obsolete, duplicate, and legacy files that have accumulated
over the course of development. The repository is now focused on the current
Auth0-based, NestJS/React implementation.

Files Removed:

1. Old Backup Directories (150+ files)
   - backend-old-20260125/ (entire directory)
   - frontend-old-20260125/ (entire directory)
   These should never have been committed to version control.

2. Obsolete Authentication Documentation (12 files)
   - KEYCLOAK_INTEGRATION_COMPLETE.md
   - KEYCLOAK_SETUP.md
   - SUPABASE_MIGRATION.md
   - GOOGLE_OAUTH_*.md (4 files)
   - OAUTH_*.md (3 files)
   - auth0-action.js
   - auth0-signup-form.json
   We are using Auth0 only - these docs are no longer relevant.

3. Legacy Deployment Files (15 files)
   - DOCKER_HUB_*.md (3 files)
   - STANDALONE_INSTALL.md
   - UBUNTU_INSTALL.md
   - SIMPLE_DEPLOY.md
   - deploy.sh, simple-deploy.sh, standalone-setup.sh
   - setup.sh, setup.ps1
   - docker-compose.{hub,prod,test}.yml
   - Dockerfile.e2e
   - install.md
   These deployment approaches were abandoned.

4. Legacy Populate Scripts (12 files)
   - populate-events*.{js,sh} (4 files)
   - populate-test-data.{js,sh}
   - populate-vips.js
   - quick-populate-events.sh
   - update-departments.js
   - reset-database.ps1
   - test-*.js (2 files)
   All replaced by Prisma seed (backend/prisma/seed.ts).

5. Implementation Status Docs (16 files)
   - BUILD_STATUS.md
   - NAVIGATION_UX_IMPROVEMENTS.md
   - NOTIFICATION_BADGE_IMPLEMENTATION.md
   - DATABASE_MIGRATION_SUMMARY.md
   - DOCUMENTATION_CLEANUP_SUMMARY.md
   - PERMISSION_ISSUES_FIXED.md
   Historical implementation notes - no longer needed.

6. Duplicate/Outdated Documentation (10 files)
   - PORT_3000_SETUP_GUIDE.md
   - POSTGRESQL_USER_MANAGEMENT.md
   - REVERSE_PROXY_OAUTH_SETUP.md
   - WEB_SERVER_PROXY_SETUP.md
   - SIMPLE_USER_MANAGEMENT.md
   - USER_MANAGEMENT_RECOMMENDATIONS.md
   - ROLE_BASED_ACCESS_CONTROL.md
   - README-API.md
   Information already covered in main README.md and CLAUDE.md.

7. Old API Documentation (2 files)
   - api-docs.html
   - api-documentation.yaml
   Outdated - API has changed significantly.

8. Environment File Duplicates (2 files)
   - .env.prod
   - .env.production
   Redundant with .env.example.

Updated .gitignore:
- Added patterns to prevent future backup directory commits
- Added *-old-*, backend-old*, frontend-old*

Impact:
- Removed 273 files
- Reduced repository size significantly
- Cleaner, more navigable codebase
- Easier onboarding for new developers

Current Documentation:
- README.md - Main documentation
- CLAUDE.md - AI context and development guide
- REQUIREMENTS.md - Requirements
- CASL_AUTHORIZATION.md - Current auth system
- ERROR_HANDLING.md - Error handling patterns
- QUICKSTART.md - Quick start guide
- DEPLOYMENT.md - Deployment guide
- TESTING*.md - Testing guides
- SETUP_GUIDE.md - Setup instructions

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -76,6 +76,9 @@ Thumbs.db
 *backup*
 *.bak
 *.tmp
+*-old-*
+backend-old*
+frontend-old*
 
 # Database files
 *.sqlite