[PM-38271] Speed up load org data by running queries in parallel

[JaredScar]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-38271

📔 Objective

Speeds up getting Org data by running queries in parallel rather than one after another.

[github-actions]

🤖 Bitwarden Claude Code Review

Overall Assessment: APPROVE

This PR parallelizes the two independent data fetches in OrganizationsController.GetUser() using Task.WhenAll. Both calls bottom out in repositories that isolate their own data access per invocation — the EF implementations (OrganizationUserRepository.GetManyDetailsByUserAsync, OrganizationRepository.GetByVerifiedUserEmailDomainAsync) each create a fresh IServiceScope/DatabaseContext, and the Dapper implementations each open a new SqlConnection — so concurrent execution does not share a non-thread-safe DbContext. The Task.WhenAll followed by re-awaiting each task matches existing usage in OrganizationExportController and CountsController, and neither task touches HttpContext/ClaimsPrincipal (the userId is resolved before the fan-out). Response payload and exception semantics are unchanged.

Code Review Details

No findings.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.17%. Comparing base (643e3aa) to head (f16b50b).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...dminConsole/Controllers/OrganizationsController.cs	0.00%	5 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (643e3aa) and HEAD (f16b50b). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (643e3aa)	HEAD (f16b50b)
	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8202      +/-   ##
==========================================
- Coverage   68.41%   63.17%   -5.24%     
==========================================
  Files        2380     2381       +1     
  Lines      103679   103774      +95     
  Branches     9386     9394       +8     
==========================================
- Hits        70931    65560    -5371     
- Misses      30420    35983    +5563     
+ Partials     2328     2231      -97     

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