fix(cctv): harden the King County catalog fetch and dedupe before the cap

The catalog fetch now refuses redirects, cancels rejected bodies and reads
through the shared capped JSON reader. Duplicate ids are dropped before
prioritization so they cannot use up the per-pack cap. Vendor-generic model
strings (PTZ, PTZ IP, BOSCH/PTZ) are treated as no model. Comments and credits
say why WSDOT rows are skipped (their frames are WSDOT-hosted, outside the
pinned origin) and name Newcastle as the partner city that appears.

src/data/dataCredits.js

@@ -261,7 +261,7 @@ export const DATA_CREDITS = [
       '<a href="https://kingcounty.gov/en/dept/local-services/roads" target="_blank" rel="noopener">kingcounty.gov</a>, ' +
       'per the ' +
       '<a href="https://kingcounty.gov/en/dept/kcit/data-information-services/gis-center/about/terms-conditions-copyrights" target="_blank" rel="noopener">KCGIS Center terms</a>. ' +
-      'A few cameras are supplied by partner cities (Redmond, Sammamish, Newcastle, Snoqualmie); each names its owner in the CCTV panel.',
+      'Partner-city cameras hosted on the county image handler (e.g. Newcastle) name their owner in the CCTV panel.',
   },
   {
     key: 'vegvesen-cctv',