feat(cctv): add the Open Calgary camera pack (#514)

Supersedes #438 by @rileygramlich, ported onto the current component layout with fixes from review.

Verified before merge: format, package boundaries, unit suite, build, and the browser tracking suite; a browser harness for the change where one applies; adversarial review applied.

Co-authored-by: rileygramlich <[email protected]>

server/providers/cctv/catalog.js

@@ -16,6 +16,7 @@ import {
   loadTarkteeSourcesFromDatex,
   loadWarendorfSourcesFromCatalog,
   loadNswSourcesFromOpenData,
+  loadCalgarySourcesFromOpenData,
 } from './sources.js';
 
 /** Env kill switch: unset or anything but "0" means enabled. */
@@ -80,6 +81,11 @@ const LIVE_PACKS = [
     enabled: () => envEnabled('CCTV_NSW_ENABLED'),
     load: loadNswSourcesFromOpenData,
   },
+  {
+    name: 'calgary',
+    enabled: () => envEnabled('CCTV_CALGARY_ENABLED'),
+    load: loadCalgarySourcesFromOpenData,
+  },
 ];
 /**
  * Load CCTV sources from a local JSON file (CCTV_SOURCES_FILE env or default).