Cardano signatures are not produced on testing-sanchonet

[jpraynaud]

Why

Cardano transactions are not produced consistently on the testing-sanchonet. The problem is not occurring on the testing-preview network which is running the same code as testing-sanchonet.

What

Investigate and fix the problem which prevent consistent signing.

How

• Investigate the problem on the signature process in testing-sanchonet: parse problem with some blocks
  • Activate GitHub environment variable AGGREGATOR_ALLOW_UNPARSABLE_BLOCK to true
  • File a bug on pallas repository
• Fix the signature process in testing-sanchonet:
  • Apply pallas patch
  • Rollback GitHub environment variable AGGREGATOR_ALLOW_UNPARSABLE_BLOCK to false
  • Reset Cardano transactions stores of aggregator

[jpraynaud]

I commented on the issue txpipe/pallas#410 (comment) with the problem that we have noticed with blocks parsing with pallas.