[PM-21031] Optimize GET Members endpoint performance (#5907)

* Add new feature flag for Members Get Endpoint Optimization

* Add a new version of OrganizationUser_ReadByOrganizationIdWithClaimedDomains that uses CTE for better performance

* Add stored procedure OrganizationUserUserDetails_ReadByOrganizationId_V2 for retrieving user details, group associations, and collection associations by organization ID.

* Add the sql migration script to add the new stored procedures

* Introduce GetManyDetailsByOrganizationAsync_vNext and GetManyByOrganizationWithClaimedDomainsAsync_vNext in IOrganizationUserRepository to enhance performance by reducing database round trips.

* Updated GetOrganizationUsersClaimedStatusQuery to use an optimized query when the feature flag is enabled

* Updated OrganizationUserUserDetailsQuery to use optimized queries when the feature flag is enabled

* Add integration tests for GetManyDetailsByOrganizationAsync_vNext

* Add integration tests for GetManyByOrganizationWithClaimedDomainsAsync_vNext to validate behavior with verified and unverified domains.

* Optimize performance by conditionally setting permissions only for Custom user types in OrganizationUserUserDetailsQuery.

* Create UserEmailDomainView to extract email domains from users' email addresses

* Create stored procedure Organization_ReadByClaimedUserEmailDomain_V2 that uses UserEmailDomainView to fetch Email domains

* Add GetByVerifiedUserEmailDomainAsync_vNext method to IOrganizationRepository and its implementations

* Refactor OrganizationUser_ReadByOrganizationIdWithClaimedDomains_V2 stored procedure to use UserEmailDomainView for email domain extraction, improving query efficiency and clarity.

* Enhance IOrganizationUserRepository with detailed documentation for GetManyDetailsByOrganizationAsync method, clarifying its purpose and performance optimizations. Added remarks for better understanding of its functionality.

* Fix missing newline at the end of Organization_ReadByClaimedUserEmailDomain_V2.sql to adhere to coding standards.

* Update the database migration script to include UserEmailDomainView

* Bumped the date on the migration script

* Remove GetByVerifiedUserEmailDomainAsync_vNext method and its stored procedure.

* Refactor UserEmailDomainView index creation to check for existence before creation

* Update OrganizationUser_ReadByOrganizationIdWithClaimedDomains_V2 to use CTE and add indexes

* Remove creation of unique clustered index from UserEmailDomainView and related migration script adjustments

* Update indexes and sproc

* Fix index name when checking if it already exists

* Bump up date on migration script

src/Core/AdminConsole/Repositories/IOrganizationUserRepository.cs

@@ -36,6 +36,12 @@ public interface IOrganizationUserRepository : IRepository<OrganizationUser, Gui
     /// <param name="includeCollections">Whether to include collections</param>
     /// <returns>A list of OrganizationUserUserDetails</returns>
     Task<ICollection<OrganizationUserUserDetails>> GetManyDetailsByOrganizationAsync(Guid organizationId, bool includeGroups = false, bool includeCollections = false);
+    /// <inheritdoc cref="GetManyDetailsByOrganizationAsync"/>
+    /// <remarks>
+    /// This method is optimized for performance.
+    /// Reduces database round trips by fetching all data in fewer queries.
+    /// </remarks>
+    Task<ICollection<OrganizationUserUserDetails>> GetManyDetailsByOrganizationAsync_vNext(Guid organizationId, bool includeGroups = false, bool includeCollections = false);
     Task<ICollection<OrganizationUserOrganizationDetails>> GetManyDetailsByUserAsync(Guid userId,
         OrganizationUserStatusType? status = null);
     Task<OrganizationUserOrganizationDetails?> GetDetailsByUserAsync(Guid userId, Guid organizationId,
@@ -70,7 +76,10 @@ public interface IOrganizationUserRepository : IRepository<OrganizationUser, Gui
     /// Returns a list of OrganizationUsers with email domains that match one of the Organization's claimed domains.
     /// </summary>
     Task<ICollection<OrganizationUser>> GetManyByOrganizationWithClaimedDomainsAsync(Guid organizationId);
-
+    /// <summary>
+    /// Optimized version of <see cref="GetManyByOrganizationWithClaimedDomainsAsync"/> with better performance.
+    /// </summary>
+    Task<ICollection<OrganizationUser>> GetManyByOrganizationWithClaimedDomainsAsync_vNext(Guid organizationId);
     Task RevokeManyByIdAsync(IEnumerable<Guid> organizationUserIds);
 
     /// <summary>