Add integration test for admin function reverts leaving protocol config values unchanged

[Chucks1093]

Summary

When an admin function reverts (e.g. due to an unauthorized caller or invalid input), the protocol config values it was attempting to update must remain at their previous values. An integration test should attempt a failing admin call and assert all config values are unchanged after the revert.

Scope

• Initialize the contract with fee bps 200 and a known fee recipient
• Attempt to update fee bps to 400 using a non-admin wallet — assert the call reverts
• Read fee bps and assert it is still 200
• Attempt to update fee recipient using a non-admin wallet — assert the call reverts
• Read fee recipient and assert it is still the original address

Acceptance Criteria

• Fee bps unchanged after failed admin call
• Fee recipient unchanged after failed admin call
• Both reads confirm original values post-revert
• Test uses a wallet that is explicitly not the contract admin

ETA: 12 hours

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[chidii]

@chidii has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello Maintainer, I've reviewed this issue thoroughly and I'm well positioned to resolve it — experienced across the relevant stack and comfortable navigating the existing codebase. Ready to start right away.

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[baedboibidex-cmyk]

@baedboibidex-cmyk has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

pls assign

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