[SEV1] Nodes stop syncing due to "failed to verify beacon". #12467
Description
This issue is capturing the investigation and communication about the network sync issue that occurred for some Lotus nodes on 2024-09-16 16:35 UTC (https://status.filecoin.io/#subscribe-modal-s11bzdg62qcb).
### Tasks
- [x] Fix in master: https://github.com/filecoin-project/lotus/pull/12469
- [x] Fix in v1.28.3: https://github.com/filecoin-project/lotus/pull/12468
- [x] Fix in v1.29.1: https://github.com/filecoin-project/lotus/pull/12471
- [x] Release v1.28.3: https://github.com/filecoin-project/lotus/releases/tag/v1.28.3
- [x] Release v1.29.1: https://github.com/filecoin-project/lotus/releases/tag/v1.29.1
- [x] Create tracking issue to undo the temporary workaround: https://github.com/filecoin-project/lotus/issues/12472