feat(bikeshare): add Bike Share Toronto

Toronto runs the same PBSC platform as the Austin, Honolulu and
Chattanooga systems already in the registry, and publishes the identical
GBFS v2 endpoint pair under `toronto.publicbikesystem.net`. The proxy
allowlist already admits the host through its `*.publicbikesystem.net`
wildcard and the paths end in the expected `station_information.json` /
`station_status.json`, so the system needs no new plumbing — only the
registry entry that names it.

Verified against the live feeds: 1,069 stations in both documents, all
1,069 joining on `station_id`. The layer reads `num_bikes_available`,
which Toronto populates normally, so availability renders without a
vendor-specific mapping. It does not populate the standard
`num_bikes_available_types`, reporting per-type counts under PBSC ids
(ICONIC/BOOST/EFIT/ASTRO) instead; nothing reads that field today, and
this entry deliberately does not translate it rather than adding a
mapping with no consumer.

The center is downtown at 43.6532, -79.3832 with the group's 90 km load
radius. The stations span roughly 37 km east-west, from Etobicoke to
Scarborough, so a tighter radius would drop the outer ends on a downtown
pan.

The new registry test is the reason this was cheap to be sure about: it
holds every city's feed URLs against the same host and path predicates
the proxy enforces, so a city the proxy would silently refuse now fails
the suite instead of rendering an empty layer.

Credited to Bike Share Toronto (Toronto Parking Authority). The City's
open-data package declares no licence and the feed publishes no
`license_url`, so it is treated as attribution-only, like the other GBFS
operators, rather than claiming a licence that was never granted.

DATA_SOURCES.md

@@ -58,6 +58,7 @@ How to read this:
 | **Open Calgary** (`data.calgary.ca`)                                  | CCTV camera catalog + frames, Calgary                                                                                               | [Open Government Licence – City of Calgary](https://data.calgary.ca/stories/s/Open-Calgary-Terms-of-Use/u45n-7awa) — attribution REQUIRED                                                                                                                                                                                                             | "Contains information licensed under the Open Government Licence – City of Calgary"                                                         |
 | **Statens vegvesen** (catalog `ogckart-sn1.atlas.vegvesen.no`, frames `kamera.atlas.vegvesen.no`, HLS `kamera.vegvesen.no`) | CCTV camera catalog + frames + live HLS video, Norway road cameras                                                                                   | [NLOD 2.0](https://data.norge.no/nlod/en/2.0) — attribution REQUIRED | "Contains data under the Norwegian licence for Open Government data (NLOD) distributed by Statens vegvesen" |
 | **GBFS (Lyft / BCycle)**                                              | Bikeshare availability                                                                                                              | Per-feed (attribution-only)                                                                                                                                                                                                                                                                                                                           | Credit the operator (e.g. Austin BCycle) + its `license_url`                                                                                |
+| **Bike Share Toronto** (`toronto.publicbikesystem.net`) | Bikeshare station availability, Toronto | Operator GBFS feed. The City's open-data package declares no licence and the feed publishes no `license_url`, so it is treated as attribution-only like the other GBFS operators. | "Bike Share Toronto (Toronto Parking Authority)" |
 | **MBTA / MassDOT** (cdn.mbta.com) | Transit layer live vehicles and up to 15 minutes of recently observed positions, Greater Boston | MBTA / MassDOT open realtime vehicle data, used for the live view and up to fifteen minutes of recently observed positions; published for developer use and not against their use. | Attribution to MBTA / MassDOT (courtesy text) |
 | **CapMetro** (data.texas.gov) | Transit layer live vehicles, Austin TX | CapMetro open realtime vehicle data, used for the live view; published for developer use and not against their use. | Attribution to CapMetro (courtesy text) |
 | **Metro Transit** (Metropolitan Council) | Transit layer live vehicles, Minneapolis–St Paul | Metro Transit / Metropolitan Council open realtime vehicle data, used for the live view; published for developer use and not against their use. | Attribution to Metro Transit / Metropolitan Council (courtesy text) |