Function pin

packages/app/src/context/server-session.ts:1092–1095

(sessionID: string)

      evict([sessionID])
    },
    pin(sessionID: string) {
      pinned.set(sessionID, (pinned.get(sessionID) ?? 0) + 1)
      touch(sessionID)
    },
    unpin(sessionID: string) {
      const count = pinned.get(sessionID)
      if (!count || count === 1) pinned.delete(sessionID)