[REQUEST] Implement uniqueness validation for STIX bundle objects #62
Description
Feature Request
Add validation to ensure that all objects within a STIX bundle have unique id values. Currently, the schema does not prevent duplicate objects (objects with the same id) from being included in a bundle's objects array.
Proposed Solution
Implement the createUniqueObjectsOnlyRefinement function that validates each object's id is unique within the bundle. The refinement should:
- Track all object IDs as the array is validated
- Report clear error messages when duplicates are found, including the duplicate ID value
- Report the path to each duplicate object for easy debugging