Nimbus - Add record is ready method

[jeddai]

This is a O(n) change.

Pull Request checklist

• Breaking changes: This PR follows our breaking change policy
  • This PR follows the breaking change policy:
    • This PR has no breaking API changes, or
    • There are corresponding PRs for our consumer applications that resolve the breaking changes and have been approved
• Quality: This PR builds and tests run cleanly
  • Note:
    • For changes that need extra cross-platform testing, consider adding [ci full] to the PR title.
    • If this pull request includes a breaking change, consider cutting a new release after merging.
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry in CHANGELOG.md or an explanation of why it does not need one
  • Any breaking changes to Swift or Kotlin binding APIs are noted explicitly
• Dependencies: This PR follows our dependency management guidelines
  • Any new dependencies are accompanied by a summary of the due dilligence applied in selecting them.

Branch builds: add [firefox-android: branch-name] to the PR title.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (430436c) 27.63% compared to head (81a080d) 27.63%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6063   +/-   ##
=======================================
  Coverage   27.63%   27.63%           
=======================================
  Files         398      398           
  Lines       50186    50186           
=======================================
  Hits        13870    13870           
  Misses      36316    36316           

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[eliserichards]

Lovely! 💯