Workaround to allow dandischema.conf.Config to be initialized with field names

[candleindark]

This PR implements a workaround to allow dandischema.conf.Config to be initialized with the names of the fields in the model instead of the aliases of the fields. I.e., it circumvents the bug in Pydantic BaseSettings documented in pydantic/pydantic-settings#689.

This workaround is necessary at the moment because it allows reconstitution of the Config instance disclosed by the api/info/ endpoint. (The JSON representation of the Config instance at the endpoint is a serialization of the instance using field names instead of aliases. Though it is possible to serialize a Config instance at the endpoint using aliases, but that's not a desirable option since aliases are obscure.)

[codecov]

Codecov Report

❌ Patch coverage is 98.27586% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 97.94%. Comparing base (fdddc69) to head (7eafc38).
⚠️ Report is 7 commits behind head on devendorize.

Files with missing lines	Patch %	Lines
dandischema/conf.py	94.44%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           devendorize     pydantic/pydantic#336      +/-   ##
===============================================
- Coverage        97.94%   97.94%   -0.01%     
===============================================
  Files               18       18              
  Lines             2292     2340      +48     
===============================================
+ Hits              2245     2292      +47     
- Misses              47       48       +1     

Flag	Coverage Δ
unittests	97.94% <98.27%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Copilot]

Pull Request Overview

This PR implements a workaround to allow dandischema.conf.Config to be initialized with field names instead of field aliases, circumventing a Pydantic BaseSettings bug. This enables proper reconstitution of Config instances from JSON serialization using field names rather than obscure aliases.

• Adds a custom settings_customise_sources method that wraps the init settings source to convert field names to aliases
• Updates all test cases to use field names instead of aliases when creating Config instances
• Adds new tests for initialization with both field names and aliases, dotenv file handling, and round-trip serialization

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
dandischema/conf.py	Implements the workaround by adding a custom settings source that maps field names to aliases for initialization
dandischema/tests/test_conf.py	Updates test cases to use field names and adds comprehensive tests for the new initialization behavior

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}