Road closures, for one province

GET /incidents, /closures and /road-conditions over DriveBC's Open511 feed. One province of thirteen, and the reason it is one province is that 511 Alberta wants an API key nobody has registered for.

• Polled live behind a 60 second cache, not ingested: a road event that is an hour old is worthless, and a cached snapshot hides its own age
• A closure means the publisher said closed. The event category says why a road is affected, never whether it is shut, and several construction events describe brief closures in prose while reporting all lanes open
• The publisher's description comes back verbatim. Our categories are a lossy projection of theirs, and the sentence a driver needs is in the prose

AvailabilityAvailability was not re-checked against production for this record. The note covers British Columbia provincial events from DriveBC. Routing does not avoid them.