Baker: apply operations on round greater than zero

Context

This MR re-enables the application-dependant checks for block (both fresh and proposal) at round greater than zero. This is a safety net for cases where validation-only at round 0 did not produce a correct block.

Manually testing the MR

CI green

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• n/a Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR