Performs a full update (replacement) of a position. All fields in the request body will replace the current values.
Business Rules:
• Role (externalCodeRole) is required and must exist
• Area (externalCodeArea) is required and must exist
• Parent position is optional - can be null for root position
• Employee assignment is optional (can be null to unassign)
• Employee can only be assigned to one position at a time
• Operation Unit (externalCodeOperationUnit) is optional (can be null to unassign)
• Set nullable fields to null to remove them
Additional Leaders (additionalParents):
• When provided, completely replaces existing additional leaders
• An empty array removes all additional leaders
• If not provided, existing additional leaders are preserved
• Maximum of 5 additional leaders allowed
• All additional leader positions must exist
• Cannot reference itself or main parent as additional leader
• No duplicate codes allowed in the list