test: improved caching

Author: lkstrp

.github/workflows/test.yaml

@@ -11,7 +11,7 @@ on:
     branches:
     - master
   schedule:
-  - cron: "0 5 * * *"
+  - cron: "0 1 * * *"
 
 # Cancel any in-progress runs when a new run is triggered
 concurrency:
@@ -41,11 +41,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ${{ fromJSON(needs.build.outputs.python-versions) }}
-        os:
-        - ubuntu-latest
-        - macos-latest
-        - windows-latest
+        # Only run ubuntu/3.12 on scheduled runs
+        python-version: ${{ fromJSON(github.event_name == 'schedule' && '["3.12"]' || needs.build.outputs.python-versions) }}
+        os: ${{ fromJSON(github.event_name == 'schedule' && '["ubuntu-latest"]' || '["ubuntu-latest","macos-latest","windows-latest"]') }}
     env:
       MPLBACKEND: Agg  # https://github.com/orgs/community/discussions/26434