docs(cctv): Ontario 511 docs match the key requirement and the developer agreement

Review fixes for #1228: CURRENT-STATE.md and the constants comment no
longer call Ontario 511 keyless. DATA_SOURCES.md notes Ontario 511's
Developer's Access Agreement (511on.ca/developers/resources): the data
stays under the Open Government Licence - Ontario, key requests are
reviewed case by case, attribution by link is encouraged and the logo
rules don't apply because the app shows none, and the "as is" disclaimer
should be passed on, which the credit now does.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/CURRENT-STATE.md

@@ -4388,8 +4388,10 @@ silently demoting every later lookup for the session.
   default 36 → 250, hard bound 300), filtered to `camera_status === TURNED_ON` (~815 live of
   1,003 rows). City packs (2026-07-04): Caltrans (districts 4/7/11/3 — SF, LA, San Diego,
   Sacramento; cap 300) and TfL London JamCams (cap 250) join Austin (cap 250) as keyless default
-  sources. Ontario 511 (2026-09-12) adds keyless highway cameras including Kitchener-area routes
-  (cap 1,000, all enabled rows from the current ~944-camera catalog). All sources are RAW PRIOR
+  sources. Ontario 511 (2026-09-12) adds highway cameras including Kitchener-area routes
+  (cap 1,000, all enabled rows from the current ~944-camera catalog). The 511on.ca API now
+  requires a developer key, so the pack needs `ONTARIO_511_API_KEY` and is skipped without one
+  (#1228). All sources are RAW PRIOR
   poses, and the layer is stills-first.
   sources. Fintraffic Finland road weather cameras (2026-09-13; cap 300, `CCTV_FINTRAFFIC_MAX_SOURCES`,
   kill switch `CCTV_FINTRAFFIC_ENABLED=0`) are the fourth pack: one keyless GeoJSON station list