List the trailer's versions.

Returns every version of the trailer, newest first: its number, stage (preview, finished, current; earlyLook when an early look), when it was published, its master, the beats and takes it played, its folder of raw clips with where that copy stands (archive.status: pending, archiving, archived, partial, failed), and its zip (zip.status: none, queued, building, ready, failed; a signed zip.url while ready). Every time a trailer's master is published (a preview, an early look or the finished trailer) it is kept as a numbered version, so re-assembling a trailer never loses the master it replaces: the master, and for every beat in order the take each shot played (with its trim, and its finished copy on a finished trailer), the beat's cut before the film finish, its narration, speech, music, sound effects and text layer, and the finish it was laid with. Each version's cuts and takes are copied, untouched, into a folder of their own, one per beat (trailers/<trailer>/versions/<n>-<YYYYMMDD-HHMM>/beats/<NN>-<label>/), with a manifest.json, so a later re-render never loses the clips an earlier version played. Reading versions is free, and a zip of a version's clips is made on request, free. Scope: story:read.