Updated customer metadata to only store one old btCustomerId

[cturnbull-bitwarden]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-14610

📔 Objective

Previously, we would store older braintree customers using the Stripe customer metadata field key of $"btCustomerId_{Utilities.CoreHelpers.ToEpocSeconds(DateTime.UtcNow)}". This led to some customers with a lot of metadata records, which would slow down our reporting ChartMogul software. This PR addresses this by limiting the number of older braintree customers retained to 1.

📸 Screenshots

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – 11ceda4f-89d9-4137-8b16-9d02ddd7b188

Fixed Issues

Severity	Issue	Source File / Package
	CSRF	/src/Api/AdminConsole/Controllers/PoliciesController.cs: 68
	CSRF	/src/Api/AdminConsole/Controllers/OrganizationUsersController.cs: 106
	CSRF	/src/Api/AdminConsole/Controllers/GroupsController.cs: 81
	CSRF	/src/Api/AdminConsole/Controllers/OrganizationUsersController.cs: 238
	CSRF	/src/Api/AdminConsole/Controllers/GroupsController.cs: 81
	CSRF	/src/Api/AdminConsole/Controllers/GroupsController.cs: 131
	CSRF	/src/Api/AdminConsole/Controllers/OrganizationsController.cs: 122
	CSRF	/src/Api/AdminConsole/Controllers/OrganizationUsersController.cs: 362
	CSRF	/src/Api/AdminConsole/Controllers/PoliciesController.cs: 89
	CSRF	/src/Api/AdminConsole/Controllers/PoliciesController.cs: 159
	CSRF	/src/Api/AdminConsole/Public/Controllers/PoliciesController.cs: 42
	CSRF	/src/Api/AdminConsole/Public/Controllers/PoliciesController.cs: 61
	CSRF	/src/Admin/AdminConsole/Controllers/OrganizationsController.cs: 372
	Log_Forging	/src/Api/AdminConsole/Controllers/ProvidersController.cs: 72
	Log_Forging	/src/Api/AdminConsole/Controllers/ProvidersController.cs: 72
	Log_Forging	/src/Api/AdminConsole/Controllers/ProvidersController.cs: 72
	Log_Forging	/src/Api/Auth/Controllers/EmergencyAccessController.cs: 102

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 42.67%. Comparing base (df21d57) to head (104879d).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
...e/Services/Implementations/StripePaymentService.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4997   +/-   ##
=======================================
  Coverage   42.66%   42.67%           
=======================================
  Files        1411     1411           
  Lines       65087    65087           
  Branches     5959     5959           
=======================================
+ Hits        27772    27773    +1     
+ Misses      36075    36074    -1     
  Partials     1240     1240           

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