Module post 

Enums

PostError

Functions

handle

Registers a ticket file: validates and stamps frontmatter, indexes the ticket, and for auto and at creates one queued activation. Reposting a stamped file is idempotent; reposting with a different --at time reschedules the queued activation. The dispatcher is the only caller and computes at_eligible_ms from its injected clock, so plain reads before writes here cannot race another writer.