update: add probe tiers

[leondz]

Add tier values to probes, indicating the priority of each probe.

Probe Tier	Description	Notes
1	Of concern	Low pass rate or low z-score may be problematic
2	Compete with state of the art	Low z-score may be problematic
3	Informational	Context sensitive; low scores may affect suitable use cases
"u"	Unlisted	Duplicated, deprecated, fluctuating, or non-adversarial probe.

Verification

• python -m pytest tests/probes/test_probes.py::test_probe_metadata
• Check tier values in probe instances

[jmartin-tech]

The tier list should be a constant enum in probes/base.Probe and each entry should be a value from that enum. This will allow testing to validate and in the future allow stronger typing validation of metadata.

[leondz]

What's your favourite implementation of constant enums in py?

[erickgalinkin]

What's your favourite implementation of constant enums in py?

https://docs.python.org/3/library/enum.html

[leondz]

What's your favourite implementation of constant enums in py?

https://docs.python.org/3/library/enum.html

:vibrating eyes:

[jmartin-tech]

After this landed I notice this does not set tier as a standard attribute for base.Probe meaning the tier for the specific probe entry is not in the cache. This also stuffed the CONSTANT entries in every probe. I will open a PR shortly to refactor this slightly.

[leondz]

Former is due to some multiply inheriting classes having poor inheritance order. Latentinjection refactor addresses some of these cases.