Summary of Changes

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This pull request introduces a significant improvement to the Celestia network by proposing to halve the block time. This change is designed to enhance the user experience through faster transaction confirmations and increase the network's data throughput capacity. It involves a series of carefully calculated parameter adjustments across consensus, evidence, and IBC modules to ensure network stability and maintain existing time-based guarantees despite the accelerated block production.

Highlights

• Block Time Reduction: The Celestia block time is proposed to be reduced from 6 seconds to 3 seconds, aiming to improve transaction confirmation latency and overall network throughput.
• Consensus Parameter Adjustments: Key consensus timeout parameters, specifically TimeoutPropose and DelayedPrecommitTimeout, have been adjusted to align with the new 3-second block time.
• Block-Count Parameter Doubling: Parameters based on block counts, such as MaxAgeNumBlocks and various upgrade height delays (Arabica, Mocha, Mainnet), have been doubled to maintain their original wall-clock durations at the faster block rate.
• IBC Parameter Correction: The IBC MaxExpectedTimePerBlock parameter has been corrected from 75 seconds to 15 seconds to accurately reflect the new expected block time, adhering to IBC documentation guidelines.
• Deprecation of GoalBlockTime: The GoalBlockTime constant, which was inaccurate and misleading, has been deprecated and removed, as the actual block time is governed by consensus timeout parameters.

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