Update leverage for a specific trading symbol.
Platform Support: Available on hyperliquid, aster, lighter. Not available on kuru (spot DEX - no leverage).
Implementation Notes:
Platform-Specific Limits:
Leverage updated successfully
Trading symbol
Updated leverage value
Margin type (cross or isolated)
Maximum notional value allowed at this leverage (if available)
Timestamp when HyperETH API server received this message from the venue (in milliseconds)
Timestamp when HyperETH API server completed all processing before returning to client (in milliseconds)