DEV1.0: Initial commit - Workflow Portal with security fixes

- Backend: Express.js + PostgreSQL/SQLite with LDAP/AD integration
- Frontend: React 18 + Vite + TailwindCSS/DaisyUI
- Security fixes applied (2026-07 + 2026-08):
  - LDAP injection prevention, CSRF protection, HttpOnly cookies
  - Session hashing (SHA-256), account lockout, rate limiting
  - Input validation (zod), file upload security, CSP/HSTS headers
  - V3: express-rate-limit updated (ip-address SSRF fix)
  - V4: postcss updated (nanoid DoS fix)
  - V5: Rate-limit on /health endpoint
  - V6: Session rotation on login (session fixation prevention)
  - V9: Task values array limit (DoS prevention)
  - V10: Frontend XSS audit completed
- Docker: Multi-stage build, non-root user, PostgreSQL + backup service

.gitignore

@@ -0,0 +1,33 @@
+# Secrets & Environment
+.env
+.env.local
+.env.*.local
+**/.env
+**/.env.local
+
+# Dependencies
+node_modules/
+**/node_modules/
+
+# Database & Data
+backend/data/
+*.db
+*.db-journal
+
+# Build artifacts
+frontend/dist/
+dist/
+build/
+
+# Logs
+*.log
+npm-debug.log*
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Editor
+.vscode/
+.idea/
+*.swp