implement features of CalITP's GTFS Data Quality Dashboard

[derhuerst]

e.g. https://reports.calitp.org/gtfs_schedule/2022/12/282/index.html

• dates with/without service?
• service hours per weekday?
• changed identifiers between feed versions
• User Story: aggregated GTFS schedule service hours by month-day_type-time_of_day cal-itp/data-infra#2234
• Feature request: Geographic spot checks for expected transit service cal-itp/data-infra#1225
• GTFS Guidelines: Existence of Pathways data for all child/parent stop relationships cal-itp/data-infra#562
• MSD Dashboard Metric: Number of feeds with data about physical accessibility cal-itp/data-analyses#165

When comparing a set of consecutive versions of one provider's feed:

• User Story: Check whether schedule changes provide at least one week of lead time cal-itp/data-infra#1650