fix(core): patch pickup duplication exploit and secure chardel command

[voidvalue-dev]

Summary of Changes

1. es_extended (pickup.lua):

   • Added tonumber() sanitization for pickupId.
   • Introduced an immediate claimed lock flag when a pickup request is processed.
   • Added rollback handling to unclaim the pickup if the player cannot carry the item or already owns the weapon, preventing item duplication via race conditions.

2. esx_identity (main.lua):

   • Changed /chardel command permission level from user to admin to ensure regular players cannot delete characters when debug commands are enabled.