[CHANGE] Enhance error handling for ESI downtime and update retry logic in providers

[Geuthur]

Description

Changed

• Enhance error handling for ESI downtime and update retry logic in providers

Type of Changes

Please select the type of changes made in this pull request:

• Bug Fix (non-breaking change which fixes an Issue)
• New Feature (non-breaking change)
• Other (please specify):

Checklist

Please ensure the following before submitting your pull request:

• I have read the contributing guidelines.
• My code follows the code style of this project.
• I have performed a self-review of my code.
• I have commented my code where necessary.
• All new and existing tests passed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
taxsystem/errors.py	100.00% <100.00%> (ø)
taxsystem/providers.py	95.91% <100.00%> (+1.32%)	⬆️

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