feat(TimetableController): CSV-based Foxboro trips

[thecristen]

Scope

In preparation for tickets going on sale to the friendly game on 3/26!

Implementation

We're partially re-using the hack that lets us show custom timetables for the Boat-F6/7/8 routes, with slightly more hack layered on top for the one day we won't have GTFS data for. It is neither the best nor worst code I've written.

• Dotcom.Timetableloader got an extra customization to add a trip name, so that we can show train names in the table
• DotcomWeb.ScheduleController.TimetableController got an extra clause in assign_trip_schedules/1. The existing clause for handling the Dotcom.Timetableloader-based data wasn't quite adequate as-is, since there were a few differences between how the ferry-based timetables and how this Foxboro timetables wished to handle absent data.

Screenshots

How to test

• http://localhost:4001/schedules/CR-Foxboro/timetable?date=2026-03-26&schedule_direction%5Bdirection_id%5D=0 Outbound on the game day.
• Can also verify that
  • Inbound Foxboro on the game day shows the expected no scheduled trips display
  • Foxboro on the other game day (3/14) still works and shows GTFS data.
  • The other timetables still work as expected.

[joshlarson]

Thanks for doing this so quickly!