add shred-type to shred seed #25556

Active on mainnet-beta (epoch 318), testnet (epoch 328) and devnet (epoch 325).

Introduced in solana-labs/solana PR #25556.

Feature id Ds87KVeqhbv7Jw8W6avsS1mqz3Mw5J3pRTpPoDQ2QdiJ.

Vortex

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