audit-fix(rollup): add bounds to admin setters

[d1r1]

Resolves https://github.com/sherlock-audit/2026-03-fluent-mar-20th-2026/issues/59

• cap incentiveFee, gasLeft, acceptDepositDeadline
• enforce min challengeDepositAmount (0.001 ETH)
• add ValueOutOfBounds error for bound checks

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