fix(); perps-schema; allow multiple liquidations per position

[dhruv-chauhan]

• Issue:
  • For Gmx, the following query fails with message: "message": "Ambiguous result for derived field 'liquidation': Multiple 'Liquidate' entities refer back via 'position'"
  • Same is the case with mummy-finance, and level-finance.
• Fix:
  • On tracing a position, we figured that a position can be partially liquidated multiple times, so the assumption in the schema that a position shall only point to one liquidation event is not true. (Trace: position_logs.md)
  • Since these liquidation events are getting created fine, it’s only the reference to the position that’s broken due to the constraint. Allowing multiple liquidation references for a position fixes this.
• Deployments:
  • gmx-arbitrum
  • mummy-finance-optimism
  • level-finance-bsc
  • gains-trade-arbitrum
  • mux-protocol-arbitrum

[melotik]

lgtm! Nice fix @dhruv-chauhan

[ishraq8]

Data looks good.

just make sure the correction from this PR is
included: #2315