feat(transit): add Burlington, switch Barrie and YRT on

Burlington's route ids are internal keys with a trap in them: `351` is
route 1 while `3510` is route 10, so no prefix trim is correct and the
table is a real join against the City's own published GTFS. Its licence is
the same 2011 municipal template as Mississauga — revocable, and the terms
must travel with the data, so licenseUrl is the terms document itself.
Plain http:// has no listener at all, so https is mandatory, not preferred.

Barrie and YRT ship on. Both operators invite acceptance of their licence
through a form, and both licences also state that use is itself acceptance
("By using Barrie Transit Data, you agree to be bound by these terms";
"Your Use of Information indicates Your acceptance"). This deployment
relies on that clause, and both entries record it so the reasoning does not
have to be re-derived.

Nine Ontario feeds now, all verified live against their upstreams.

docs/CURRENT-STATE.md

@@ -3659,12 +3659,11 @@ Transit is off by default, and share links use token `j`. The movement panel ord
 places Transit directly after Street Traffic and before Bike Share. Cameras and
 utilities retain their own groups. The layer polls
 registered feeds near the camera every 15 seconds, below a 3,000 km altitude
-gate. Thirteen keyless regions are available: Boston, Austin, Minneapolis–St Paul,
-Helsinki, the Netherlands, Norway, South East Queensland, Toronto (TTC
-surface vehicles; the subway publishes no positions), the Golden Horseshoe
-neighbours MiWay, Hamilton HSR and Durham Region Transit, and Guelph and
-Kingston. Barrie and YRT/Viva are registered but ship off,
-pending acceptance of their licences. Mode silhouettes
+gate. Sixteen keyless regions are available: Boston, Austin, Minneapolis–St Paul,
+Helsinki, the Netherlands, Norway, South East Queensland, and nine in
+Ontario — Toronto (TTC surface vehicles; the subway publishes no
+positions), MiWay, Hamilton HSR, Durham Region, YRT/Viva, Guelph,
+Burlington, Barrie and Kingston. Mode silhouettes
 identify buses, trams, subways, trains, ferries and unclassified vehicles.
 
 Retained transit history uses the same outlier quarantine as live observations and