Add addition workflows for journey API

[domonkosadam]

The AI endpoints on the current production Journey API won't work without the pine and cedar workflows. It will be fixed on the backend side as well, but to ensure seamless transition between the versions we should add the additional workflows on client-side.

Test plan:

1. With a production account, AI Assist doesn't work
2. With this change AI Assist works properly in the production environment

[claude]

Claude Code Review

✅ APPROVED

• Change correctly returns an array of workflows for JWT token requests
• .journey service now properly includes pine and cedar workflows as needed for production API compatibility
• .redwood correctly returns only itself
• New DomainServiceWorkflow enum properly supports all workflow types (journey, redwood, pine, cedar)
• Code integrates cleanly with existing JWTTokenRequest usage in DomainJWTService
• No breaking changes: return type updated from [DomainServiceOption] to [DomainServiceWorkflow] but usage is compatible
• Resolves production AI Assist functionality issue

[inst-danger]

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Commit: Add addition workflows for journey API (dda557b)
Built At: Jan 07 10:19 CET (01/07 02:19 AM MST)

[inst-danger]

	Fails
🚫	Please add a release note. If no release note is wanted, use none. Example: release note: Fixed a bug that prevented users from enjoying the app.
🚫	Please add which apps this change affects. Example: affects: Teacher, Student or affects: none
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	Warnings
⚠️	One or more files are below the minimum test coverage 50%

Coverage	New %	Master %	Delta
Canvas iOS	91.19%	81.06%	10.13%
Core/Core/Common/Extensions/PDFKit/PDFDocumentExtensions.swift	0%	--	--

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