[PM-23900] Optimize organization exports

[harr1424]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-23900

📔 Objective

Very large and complex organization exports are causing performance degradations on specific environments, this branch explores the impact of various optimizations.

[sonarqubecloud]

Quality Gate passed

Issues
0 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

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.76%. Comparing base (869cd3a) to head (0210a25).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
.../Tools/Controllers/OrganizationExportController.cs	0.00%	8 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7590   +/-   ##
=======================================
  Coverage   59.75%   59.76%           
=======================================
  Files        2102     2102           
  Lines       92722    92724    +2     
  Branches     8261     8261           
=======================================
+ Hits        55409    55412    +3     
+ Misses      35355    35354    -1     
  Partials     1958     1958           

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