Fix evmExtendedModel for base-only chains and add firehose validation

[YaroShkvorets]

Summary

• Set firehose.evmExtendedModel to false for all EVM (eip155) chains that had evmExtendedModel: true while declaring blockFeatures: ["base"] — the extended model flag is inconsistent with a base-only feature set. This corrects 22 chains.
• ink.json additionally had its blockFeatures changed from ["extended"] to ["base"] to match its (now false) model.
• monad.json first streamable block updated (height 0 → 1, new block id).
• Added a validation warning in validate_logic.ts for the block model / features mismatch so this can't silently regress.
• Reworked validate_firehose.ts to also validate the firehose first streamable block height.

Chains with evmExtendedModel flipped to false

autonomys-chronos, autonomys, berachain-bepolia, berachain, fraxtal, gravity-mainnet, gravity-testnet, ink, ink-sepolia, megaeth-timothy, megaeth, peaq, polkadot-testnet, sei-atlantic, stable, status-sepolia, swellchain-sepolia, swellchain, vana-moksha, vana, viction, zetachain

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Version automatically bumped from 0.7.97 to 0.7.98 (patch bump).

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