[wip] feat: curio: Unseal pipeline

[magik6k]

Related Issues

Part of curio beta effort

Proposed Changes

• In progress, opening a PR early so that this work is visible
• Initially this is just a simple Unseal pipeline
  • For non-snap only
• TODO:
  • Lay out tasks
  • Implement unseal-sdr (task recomputing the last layer)
  • Implement the decode task (task which does the sealed-sectorkey->unsealed decode)
  • Implement the move-to-storage task
  • Implement a poller for the pipeline
  • Implement commands / UI / API for getting sectors through the pipeline
  • Test

Additional Info

Checklist

Before you mark the PR ready for review, please make sure that:

• Commits have a clear commit message.
• PR title is in the form of of <PR type>: <area>: <change being made>
  • example: fix: mempool: Introduce a cache for valid signatures
  • PR type: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, test
  • area, e.g. api, chain, state, market, mempool, multisig, networking, paych, proving, sealing, wallet, deps
• If the PR affects users (e.g., new feature, bug fix, system requirements change), update the CHANGELOG.md and add details to the UNRELEASED section.
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green