Filecoin Pay v2 Tracking Issue

This serves as a pointer to backlog items that should be considered for a to-be-determined Filecoiin Pay v2 that will require a new proxy due to breaking changes. Potential candidates can be linked from here or added as subtasks.

Notion tracking page: https://app.notion.com/p/filecoindev/EPIC-Update-Filecoin-Pay-Protocol-Burning-395dc41950c18063bc86ccff171e9f8b?v=27b3e0656ba7455eb42a3d6341578e20

Items in the Filecoin Pay v2 board project: https://github.com/orgs/FilOzone/projects/14/views/2?filterQuery=project%3A%22Filecoin+Pay+V2%22

See sub-issues and:
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Start with the linked Notion tracking page, the Filecoin Pay V2 board, and the listed sub-issues. This issue does not name an implementation entry point or define a completion criterion; done would require an agreed V2 scope and linked backlog work.

Written by the indexing model from the issue text.