[PM-34023] Remove 2FA account recovery flag

[eliykat]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-34023

📔 Objective

Remove the 2FA account recovery flag and associated cleanup.

• Delete feature flag and branching logic
• Delete v1 command (v2 not renamed in this PR so as to preserve the diff)
• Delete deprecated route (reset-password) - no longer used by clients
• Updated and added to integration tests

This flag is only consumed by web, so no backwards compatibility period is necessary.

Clients PR: bitwarden/clients#21291

📸 Screenshots

[github-actions]

🤖 Bitwarden Claude Code Review

Overall Assessment: APPROVE

Reviewed the removal of the AdminResetTwoFactor (pm-15489) feature flag and associated cleanup: deletion of the v1 AdminRecoverAccountCommand and its interface, removal of the flag-branching logic in OrganizationUsersController.RecoverAccount, removal of the FeatureDisabledError and the validator's flag gate, and removal of the deprecated reset-password backward-compat route. Verified no remaining references to the deleted flag, command, or route exist in the codebase (the surviving PutResetPasswordEnrollment endpoint and AccountRecovery.v2 are unrelated and untouched). Unit and integration tests were correctly updated to exercise the single surviving v2 code path, with the integration tests asserting key replacement, forced password reset, security stamp rotation, and password verification.

No findings.

Code Review Details

No issues identified. The feature-flag removal is complete and internally consistent — dead flag-off branches are removed, the v2 path is the sole remaining route, and test coverage maps cleanly to the retained behavior.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.21%. Comparing base (a7e9480) to head (5dd60c9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7815      +/-   ##
==========================================
- Coverage   65.72%   61.21%   -4.52%     
==========================================
  Files        2210     2209       -1     
  Lines       97820    97704     -116     
  Branches     8832     8815      -17     
==========================================
- Hits        64296    59812    -4484     
- Misses      31298    35768    +4470     
+ Partials     2226     2124     -102     

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[sonarqubecloud]

Quality Gate passed

Issues
7 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud