fix: include account in bitcoin getAccountAddresses

[ShaoyeLi]

Summary

• include the connected account when sending WalletConnect getAccountAddresses requests
• correct the internal request typing to use structured address responses instead of undefined params
• map returned address metadata into the bitcoin connector shape and add regression coverage for the request payload

Testing

• Verification in this worktree was blocked by repeated npm registry connection resets during pnpm install --frozen-lockfile
• Code changes were kept to the connector implementation, its focused test file, and a changeset

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[changeset-bot]

🦋 Changeset detected

Latest commit: 465e652

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