Adjust workflow cron schedules

- data-update-image-info.yml: weekly to every 4 hours
- generate-servers-jsons.yml: hourly to daily at 02:00 UTC

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: igorpecovnik

.github/workflows/data-update-image-info.yml

@@ -2,7 +2,7 @@ name: "Data: Generate build engine inventory"
 
 on:
   schedule:
-    - cron: "30 0 * * MON"
+    - cron: "0 */4 * * *"
   workflow_dispatch:
   repository_dispatch:
     types: ["Data: Generate build engine inventory"]

.github/workflows/generate-servers-jsons.yml

@@ -3,7 +3,7 @@ name: "Infrastructure: Cache servers JSONs"
 on:
   workflow_dispatch:
   schedule:
-    - cron: '0 * * * *'
+    - cron: '0 2 * * *'
 
 permissions:
   contents: write