fix(cctv): pin A22 frame redirects to WebCamImg/ and refresh on the highway cadence

- Add A22_IMAGE_ORIGIN to the pinned frame directories, so a same-host
  redirect from www.autobrennero.it/WebCamImg/ cannot leave that directory,
  as for the other directory-pinned packs.
- Give Autostrada del Brennero a 3-minute ambient refresh in cctvLod.js,
  like the other highway packs, instead of the 5-minute default.
- DATA_SOURCES: the Open Data Hub now tags every A22 record CC0; note that
  this is the aggregator's metadata, not Autobrennero's own terms.
- Tests for the redirect pin and the refresh cadence.

src/data/cctvLod.js

@@ -42,6 +42,9 @@ const PROVIDER_STATIC_REFRESH_MS = Object.freeze({
   // every 20s showed no change inside 64s but a new frame by ~90-150s later —
   // matches the other highway packs' 3-minute cadence.
   'servei català de trànsit': 3 * 60 * 1000,
+  // Autobrennero (A22) refreshes its stills about once a minute (Last-Modified
+  // tracks the minute); 3 min matches the other highway packs.
+  'autostrada del brennero': 3 * 60 * 1000,
 });
 
 /**