add runtime checks for `--fec-params` in `komodo prove`

@n.dissoubray found a bug when not passing --fec-params to komodo prove where

• null cannot be accessed
• invalid keys in $fec_params might be accessed and crash the command

this MR adds runtime checks for the type of --fec-params, to make sure it's

• non null
• has a valid shape

added 5 commits

• 5a2f89e5...b2eda009 - 4 commits from branch main
• f49d8576 - add runtime checks for `--fec-params` in `komodo prove`

Compare with previous version

enabled an automatic merge when the pipeline for f49d8576 succeeds

due to the failing CI, this MR might need to wait for !50 (merged) to land.

aborted the automatic merge because target branch was updated

added 2 commits

• 770ce024 - 1 commit from branch main
• 327ebef9 - add runtime checks for `--fec-params` in `komodo prove`

Compare with previous version

enabled an automatic merge when the pipeline for 327ebef9 succeeds

merged

mentioned in commit c9b8c5da