Region-filtered /scopes and /stats/scopes now list manual scopes configured
for the region and imported scopes whose MeshMapper catalogue includes the
IATA, instead of inferring membership from observed traffic. Filtered
/scopes returns string[] like the unfiltered call.
Manual scopes now require a region in config.
text[] from string_to_array can't match the CHAR(3) indexes and hides
the values from the planner. Handlers already have a slice; stop
joining to CSV in the store layer and pass a typed array everywhere.
MrAlders0n