Unpack a PL logistics board into calendar-ready rows
rename_logistics_alias.RdTransforms a raw PL (professional learning) logistics board, as returned by
get_monday_board() and augmented with monday_id, site, and L&R name
columns, into a flat tibble of session rows. The Monday "Timeline" range
column is split into a Session Date (range start) and Session End Date
(range end); single-day timelines yield identical start and end dates. List
columns produced by the Monday API are unnested to scalars.