7ff8caf9d7
#1298 and #1303 merged together. #1298 taught the creation paths to resolve a fragmentation_level default; #1303 removed everything that consumed it. Neither conflicted textually, so main ended up validating the field on create and update, copying it on duplicate, resolving default_fragmentation_level for it, and advertising it in the v1 API docs — for a value nothing reads and a setting the Image Security tab no longer exposes. Inert rather than broken, which is exactly why it needed removing on purpose: dead code that contradicts the PR that just deleted the feature is how the next reader concludes fragmentation still works. The events.fragmentation_level column and the app_settings row stay, as #1303 decided — dropping a column is irreversible and the stored values are harmless once nothing reads them. Refs #1300