refactor(project): pythonic

[cdddg]

1. use injector
2. refactor project structure

./
├── ...
├── src/
│   ├── di/                   - Dependency injection configurations for managing dependencies.
│   │   ├── dependency_injection.py
│   │   └── unit_of_work.py
│   │
│   ├── entrypoints/          - External interfaces like HTTP & GraphQL endpoints.
│   │   ├── graphql/          - GraphQL components for a flexible API.
│   │   └── http/             - RESTful API routes and controllers.
│   │                           ('Frameworks and Drivers' and part of 'Interface Adapters' in Clean Architecture)
│   │
│   ├── usecases/             - Contains application-specific business rules and implementations.
│   │
│   ├── repositories/         - Data interaction layer, converting domain data to/from database format.
│   │   ├── abstraction/
│   │   ├── nosql/            - Operations for NoSQL databases (e.g., MongoDB, CouchDB).
│   │   └── relational_db/    - Operations for relational databases (e.g., SQLite, MySQL, PostgreSQL).
│   │                           ('Interface Adapters' in Clean Architecture)
│   │
│   ├── models/               - Domain entities representing the business data.
│   │                           ('Entities' in Clean Architecture)
│   │
│   ├── common/               - Shared code and utilities.
│   ├── settings/
│   │   └── db/               - Database configurations.
│   │                           ('Frameworks and Drivers' in Clean Architecture)
│   │
│   └── main.py               - Main file to launch the application.
│
└── tests/
    ├── api_db_test.bats      - BATs tests for API and database interactions.
    ├── integration/          - Integration tests for testing module interactions.
    └── unit/                 - Unit tests for testing individual components in isolation.