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.

server/providers/cctv/media.js

@@ -1,6 +1,7 @@
 import { Readable } from 'node:stream';
 import { hashSeed, escapeXml, pinnedCameraUrl } from './normalize.js';
 import {
+  A22_IMAGE_ORIGIN,
   CALGARY_IMAGE_ORIGIN,
   CCTV_FRAME_FETCH_TIMEOUT_MS,
   CCTV_FRAME_MAX_BODY_BYTES,
@@ -528,6 +529,7 @@ for (const prefix of [
   HK_IMAGE_ORIGIN,
   KING_COUNTY_IMAGE_ORIGIN,
   WSDOT_IMAGE_ORIGIN,
+  A22_IMAGE_ORIGIN,
 ]) {
   const host = new URL(prefix).hostname;
   CCTV_PINNED_PREFIXES_BY_HOST.set(host, [