Add regression test for protocol fee bps read after multiple sequential updates

[Chucks1093]

Summary
The protocol fee bps read is tested after a single update, but not after multiple sequential updates. A regression test that performs three fee config updates and reads the bps after each confirms the stored value always reflects the most recent update.

Scope

• add a regression test that updates the protocol fee bps three times with distinct values
• read the fee bps after each update and assert it matches the most recent value
• assert the earlier values are not returned after being overwritten

Acceptance Criteria

• the fee bps read returns the latest value after each update
• earlier values are not returned after being overwritten
• the test covers at least three sequential updates

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[TheShnider]

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Hi. I have reviewed this issue and would like to work on it.

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[Chigybillionz]

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Please assign me this task !!

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[khanavi272-spec]

@khanavi272-spec has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would like to work on this issues

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