Async streaming tasks fix

[declan-scale]

Changes

• Make GET /tasks order by desc instead of asc (got reverted somehow)
• Remove redundant QueryProvider (already in layout.tsx)
• Default stale time is infinity to limit redundant calls (open to being a but smarter about this)
• Added updateTaskInInfiniteQuery to update the relevant caches both onTaskChange for the SSE side and when we create a task
  • This was the cause of a couple issues:
    1. the SSE stream being cut on the FE because of rerenders
    2. fetching the whole task list after landing on a specific task page would throw an error
• Updated some query keys to distinguish between individual tasks and all

[MichaelSun48]

Just that one comment, but I could totally just be missing something