## ADDED Requirements

### Requirement: pyproject.toml replaces requirements.txt
The project SHALL use `pyproject.toml` as the primary dependency and build configuration file.

#### Scenario: Install from pyproject.toml
- **WHEN** developer runs `pip install -e .`
- **THEN** all runtime dependencies are installed correctly
- **AND** the package is installed in editable mode

### Requirement: Dependencies are properly declared
The `pyproject.toml` SHALL declare all runtime, development, and optional dependencies in appropriate groups.

#### Scenario: Install with dev dependencies
- **WHEN** developer runs `pip install -e ".[dev]"`
- **THEN** testing tools (pytest, pytest-asyncio) are installed
- **AND** development tools are available

### Requirement: Package metadata is complete
The `pyproject.toml` SHALL include project metadata such as name, version, description, authors, and license.

#### Scenario: Package info is accessible
- **WHEN** user queries package metadata via `pip show backup-tool`
- **THEN** name, version, description, and author information are displayed

### Requirement: Console scripts are defined
The `pyproject.toml` SHALL define console entry points for running the application.

#### Scenario: Run via CLI command
- **WHEN** user runs `backup-tool` or `uvicorn backup_tool.main:app`
- **THEN** the application starts successfully
- **AND** the console script is properly registered