pub const SYNCED_AT: &str = "synced_at";Expand description
Marker prop holding when this store last took data from the repository.
Commit.ts says when the work was written, which on a store synced to
its repository’s head is indistinguishable from now — so it cannot answer
“how stale is my graph”. This can. Absent on a store built before it
existed, which readers must tolerate.