Security ID conflicts detected in proposed creates.
Each conflict indicates a CREATE that will fail because its security_id
is already taken by a different object on Canton. The conflicting items
are still included in creates (they represent real source-vs-Canton diffs),
but callers should handle conflicts before submitting to DAML.
Items in source but not in Canton - need to be created
Items in Canton but not in source - need to be deleted
Items in both - may need to be edited
Total number of operations (creates + edits + deletes)
Result of comparing source state (desired) to Canton state (actual).