A pure read counts the crew pulls handed to a person after three review rounds in the last 24 h, naming the newest three #6588

Done:

• [ ] New src/flow/handovers.ts exports handovers(rows, now), taking { pull, at }[] for the hand-over notes, and returning the count over 24 h and the three newest pull numbers; handoversSays words it in one line, empty when none.
• [ ] Tests: the window edge, ordering, empty.

Files: src/flow/handovers.ts, test/flow-handovers.test.ts.

Before pushing: bun x tsc --noEmit and the new test.