docs: Add unit and semantic information about the process clock
@@ -303,6 +303,8 @@ pub struct Db {
system_tables: Arc<SystemSchemaProvider>,
/// Process clock used in establishing a partial ordering of operations via a Lamport Clock.
+ ///
+ /// Value is nanoseconds since the Unix Epoch.
process_clock: Arc<Mutex<NonZeroU64>>,
/// Number of iterations of the worker loop for this Db
