chore: regen SDK for promoted OI/Liquidation/cex-symbol endpoints

Adds 9 endpoints to the Rust SDK, auto-generated from the updated
data-api openapi.yaml (Bisonai/datamaxi-backend#5804):

  - liquidation_heatmap, liquidation_map, liquidation_symbol_history
  - open_interest_{overview, summary, history_aggregated}
  - cex_symbol_{oi, oi_stats, liquidation}

Generated by datamaxi-codegen `make rust`. Total endpoints: 46 → 55.

Author: haminprk