Fix sequence preservation

[kajoseph]

Description

Trying to associateInputs after the sequence number has been changed from the default (e.g. enableRBF() is called) will result in the sequence number on the inputs being reset to the default, which will cause downstream issues when applying signatures and/or verifying transaction proposals.

Changelog

• Lints the transaction.js files for each lib - necessary for the precommits to pass.
• In a separate commit (cebe0c6), applies the sequence preservation logic

Testing Notes

I ran across this issue by creating a DOGE tx proposal with rbf enabled. I then got a BAD_SIGNATURES error when signing the txp.

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Checklist

• I have read CONTRIBUTING.md and verified that this PR follows the guidelines and requirements outlined in it.

[Copilot]

Pull request overview

Fixes a transaction input sequencing regression where calling associateInputs() after changing input sequence numbers (e.g. via enableRBF()) could reset sequences back to defaults, leading to downstream signature/verification failures.

Changes:

• Preserve existing sequenceNumber when associateInputs() replaces an input with one reconstructed from a UTXO.
• Refactor transaction.js loops/vars across libs to satisfy current lint rules (e.g., replace forEach with for...of).
• Update ESLint config for CommonJS package JS files (reduce friction with require usage and bitwise ops).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
packages/bitcore-lib/lib/transaction/transaction.js	Lint-driven refactors (loop style, minor cleanups) in core transaction implementation.
packages/bitcore-lib-ltc/lib/transaction/transaction.js	Apply sequence preservation in associateInputs() plus lint updates.
packages/bitcore-lib-doge/lib/transaction/transaction.js	Apply sequence preservation in associateInputs() plus lint updates (one lint-breaking semicolon remains).
packages/bitcore-lib-cash/lib/transaction/transaction.js	Apply sequence preservation in associateInputs() plus lint updates.
eslint.config.mjs	Adjust rules for CommonJS JS sources (warn on require-imports, disable no-bitwise for those packages).

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