fix(cctv): give Tarktee's slow DATEX feeds 30 s instead of the shared 15 s

The Estonian Transpordiamet feeds answered in 2 to 16.6 s across ten
requests (120 and 160 KB), and both must arrive for any camera to load,
so the shared 15 s catalog timeout dropped the whole pack on about a
third of loads ("Tarktee DATEX download error: The operation was aborted
due to timeout"), for the 15 minutes until the next catalog refresh.
TARKTEE_FETCH_TIMEOUT_MS gives the two requests 30 s; other packs keep
15 s.

Live: 175 cameras in 3.3 s.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

server/providers/cctv/sources.js

@@ -70,6 +70,7 @@ import {
   TORONTO_GROUND_ELEVATION_M,
   TORONTO_MAX_CATALOG_BYTES,
   CCTV_SOURCE_FETCH_TIMEOUT_MS,
+  TARKTEE_FETCH_TIMEOUT_MS,
   DELDOT_CCTV_URL,
   DEFAULT_DELDOT_MAX_SOURCES,
   DELDOT_ANCHORS,
@@ -1194,11 +1195,11 @@ export async function loadTarkteeSourcesFromDatex() {
     const [locResp, imgResp] = await Promise.all([
       fetch(TARKTEE_LOCATIONS_URL, {
         headers: { Accept: 'application/xml,text/xml,*/*' },
-        signal: AbortSignal.timeout(CCTV_SOURCE_FETCH_TIMEOUT_MS),
+        signal: AbortSignal.timeout(TARKTEE_FETCH_TIMEOUT_MS),
       }),
       fetch(TARKTEE_IMAGES_URL, {
         headers: { Accept: 'application/xml,text/xml,*/*' },
-        signal: AbortSignal.timeout(CCTV_SOURCE_FETCH_TIMEOUT_MS),
+        signal: AbortSignal.timeout(TARKTEE_FETCH_TIMEOUT_MS),
       }),
     ]);
     if (!locResp.ok) {