Duplicate Handling
Duplicate detection uses session UUID, package hash, video/content signals, capture time, duration, and device metadata. Results are classified as exact duplicate, same session with modified metadata, possible duplicate, UUID collision, or not duplicate.
No duplicate is silently deleted. A production import UI must offer keep both, replace an existing copy, cancel, or link records into a duplicate group. UUID collisions require explicit review because unrelated captures must never overwrite one another.