Common code for MeerKAT Science Data Processor services

This contains common code used by services that make up the Science Data Processor subsystem of the MeerKAT radio telescope. It includes

A common logging setup, which examines environment variables to configure some logging options and specify a server to receive logs in Graylog format.
An extension to argparse to receive command-line options via katsdptelstate.
Signal handlers to restart the process and adjust log levels.
Utilities to simplify integration with aiomonitor.
A simple wrapper around netifaces to get the IP address of a network interface.

Changelog

1.4

Remove use of deprecated datetime.utcfromtimestamp method (#38)
Fix unit tests on Python 3.12 (#38)
Run tests against requirements from katsdpdockerbase (#37)

1.3

Packaging modernisation (#34)
Drop some old Python 2 workarounds (#34)
Switch testing to pytest (#34)
Fix flake8 for pre-commit
Add --aiomonitor-webui-port command-line option (#35)

1.2

Resolve logging destination at startup (#33)

1.1

Add telstate_endpoint attribute to argparse result (#29)
Add a custom log field with timestamp in microsecond precision (#21)
Add pre-commit hooks

1.0

First public release.