Resume process blocked if user balance insufficient

### Describe the problem you discovered

In the case of a resume process, the estimated cost takes into account all bridge-related UCO fees. For example, if you resume the last step, you'll have to pay less.

### Describe the solution you'd like

Define UCO fees estimations per step

### Epic

_No response_

Start by tracing the resume-process cost estimation and the UCO fee calculation used for balance checks; no file or test is named in the issue. Done means each step estimates only the bridge-related fees it requires, so resuming a later step is not blocked by fees for earlier steps.

Written by the indexing model from the issue text.