✨ Support custom ldap attributes mapping

[pboling]

Replaces and closes #45

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.79%. Comparing base (345b2a2) to head (c132b89).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #107   +/-   ##
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  Coverage   96.79%   96.79%           
=======================================
  Files           4        4           
  Lines         312      312           
  Branches      116      116           
=======================================
  Hits          302      302           
  Misses         10       10           

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[Copilot]

Pull Request Overview

This PR makes the LDAP attribute-to-info mapping configurable by converting the hardcoded CONFIG constant into a customizable :mapping option. Users can now override the default mapping to customize which LDAP attributes map to the returned auth.info hash.

• Converted CONFIG constant to option :mapping to allow user customization
• Updated RBS type signatures to remove the obsolete CONFIG constant
• Added comprehensive test coverage for custom mapping in both standard and header SSO authentication flows

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
lib/omniauth/strategies/ldap.rb	Replaced hardcoded CONFIG constant with configurable :mapping option and modernized safe navigation syntax
spec/omniauth/strategies/ldap_spec.rb	Fixed string literal escaping in filter tests and added test coverage for custom mapping functionality
sig/omniauth/strategies/ldap.rbs	Removed obsolete CONFIG constant from type signatures
README.md	Added documentation for the new :mapping option and attempted to fix Discord link reference

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[github-actions]

Package	Line Rate	Branch Rate	Health
omniauth-ldap	98%	79%	➖
Summary	98% (287 / 294)	79% (100 / 126)	➖

Minimum allowed line rate is 97%