installation: dependencies now somewhat incompatible

```
Installing collected packages: watchdir, numpy, typer, morgul
Attempting uninstall: numpy
Found existing installation: numpy 2.0.2
Uninstalling numpy-2.0.2:
Successfully uninstalled numpy-2.0.2
Attempting uninstall: typer
Found existing installation: typer 0.15.1
Uninstalling typer-0.15.1:
Successfully uninstalled typer-0.15.1
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
numba 0.60.0 requires numpy<2.1,>=1.22, but you have numpy 2.2.1 which is incompatible.
Successfully installed morgul-0.1.0 numpy-2.2.1 typer-0.12.5 watchdir-1.0.0
```

on `pip install -e python-morgul`

Reproduce the reported command with `pip install -e python-morgul`, then inspect the package's dependency declarations and the reported NumPy/Numba conflict. Done means the editable install no longer produces the incompatibility warning while retaining the required package dependencies.

索引モデルが issue の本文から書いたものです。