SIMD-0191: Relax Transaction Loading Constraints

SIMD-0191 (Relax Transaction Loading Constraints) is a Core Standard Solana Improvement Document by Andrew Fitzgerald (Anza); proposal status Activated.

Active on mainnet-beta since epoch 757; active on testnet since epoch 748; active on devnet since epoch 839.

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• Feature gate: SIMD-0191: Relax Transaction Loading Constraints

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