[PM-38270] perf: Speed up "claimed by organization" status checks on the Members page

[r-tome]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-38270

📔 Objective

GetOrganizationUsersClaimedStatusQuery used .Any() inside a ToDictionary to test each user ID against the full claimed-users list — an O(n·m) scan that worsens as the Members page grows. This replaces it with a HashSet<Guid> built once before the loop, reducing complexity to O(n+m). Mirrors the same fix applied to TwoFactorIsEnabledQuery in PM-38265.

[github-actions]

🤖 Bitwarden Claude Code Review

Overall Assessment: APPROVE

Reviewed a single-file performance refactor in GetOrganizationUsersClaimedStatusQuery that hoists the claimed-user IDs into a HashSet<Guid> before the ToDictionary projection, replacing the per-user Any() scan and reducing lookup cost from O(n·m) to O(n+m). Behavior is preserved: claimedIds.Contains yields the same result as the prior ou.Id == ouId comparison because Guid uses value equality, and the disabled-organization and empty-input paths are unchanged. Existing unit tests in test/Core.Test/AdminConsole/OrganizationFeatures/OrganizationUsers/GetOrganizationUsersClaimedStatusQueryTests.cs already cover both the claimed and unclaimed outcomes and continue to exercise the refactored path. No security, correctness, breaking-change, or maintainability concerns identified.

Code Review Details

No findings at or above the reporting threshold.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.88%. Comparing base (3c01b90) to head (565734a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #8125       +/-   ##
===========================================
+ Coverage   15.18%   62.88%   +47.70%     
===========================================
  Files        1409     2304      +895     
  Lines       61106   100276    +39170     
  Branches     4865     9028     +4163     
===========================================
+ Hits         9277    63063    +53786     
+ Misses      51664    35029    -16635     
- Partials      165     2184     +2019     

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