Some better error handling

[nicholebarry]

Here is a recent error that happened outside of pyFHD as seen from the log file. It would be best if there was some indication of where the error occurs in the log file.

Translated from IDL to Python as a collaboration between Astronomy Data and Computing Services (ADACS) and the Epoch of Reionisation (EoR) Team.

Repository: https://github.com/EoRImaging/PyFHD

Documentation: https://pyfhd.readthedocs.io/en/latest/

Version: 1.0.2

Git Commit Hash: b6b1f70fb6dde4a02e7a1b2c6aaf3d0fcb1371c9 (uvbeam overhaul)

PyFHD Run Started At: Tue Nov 11 09:07:24 2025

Observation ID: 1106250000

Confifuration File: input/ultralow test.yaml

Validating your input...

2025-11-11 09:07:24 - INFO:
        Logging and configuration file created and copied to here: /fred/oz048/nbarry/PyFHD/output/pyfhd_1106250000
2025-11-11 09:07:24 - ERROR:
        /fred/oz048/MWA/data/ultralow/1106250000.uvfits doesn't exist, please check your input path
2025-11-11 09:07:24 - ERROR:
        /fred/oz048/MWA/data/ultralow/1106250000.metafits doesn't exist, please check your input path
2025-11-11 09:07:24 - INFO:
        No beam file was set, PyFHD will calculate the beam.
2025-11-11 09:07:24 - ERROR:
        2 errors detected, check the log above to see the errors, stopping PyFHD now```