flowchart TD
  User[کاربر] --> API[API]
  API --> elevator_bible[elevator_bible]
  API --> elevator_bible_pdf_patch[elevator_bible_pdf_patch]
  API --> scripts[scripts]
  API --> web-frontend[web-frontend]
  elevator_bible --> Data[(Data Store)]
  elevator_bible_pdf_patch --> Data[(Data Store)]
  scripts --> Data[(Data Store)]
  web-frontend --> Data[(Data Store)]

sequenceDiagram
  participant U as User
  participant C as Controller
  participant S as Service
  participant D as Database
  U->>C: HTTP Request
  C->>S: invoke handler
  S->>D: query/update
  D-->>S: result
  S-->>C: DTO
  C-->>U: HTTP Response