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docs: add API Test section with deployment link for testing

docs: update README for deployment process and contributor email, modify .gitignore to include env files, and add development environment variables

docs: update README to link environment variable files and improve clarity

docs: update README to enhance structure and clarity, adding sections for features and technologies used

refactor: remove CSRF middleware and update server configuration

fix: update user retrieval method in backup service and adjust user entity formatting

feat: implement backup module with backup service and controller

feat : add vault managament logique , and master key handling ,

feat: implement master key management and password strength checker

feat: add EMAIL_OTP_TTL environment variable and refactor email sending logic

fix: clear TFA challenge from session storage on successful verification

feat: enhance session validation middleware and extract cookie configuration to a separate file

fix: enable Redis password configuration in redis-config.ts

feat: integrate category management with API, enhance UI for category creation and deletion