chore: export negRiskOperations directly

[Olexandr88]

Export negRiskOperations directly instead of using an intermediate variable

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Note

Low Risk
Pure export refactor with no behavior changes; only minor risk if any downstream tooling depends on export style.

Overview
Simplifies the negRisk module export by switching to a single inline export const negRiskOperations = { convertPositions, redeemPositions } and removing the separate const + export { ... } statements.

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