chore: import upstream snapshot with attribution

.github/workflows/clear-cache.yml

@@ -0,0 +1,42 @@
+name: Clear cache
+
+on:
+  schedule:
+    - cron: "0 0 1 * *" # Run at midnight on the first day of every month
+  workflow_dispatch:
+
+# Restrict permissions by default
+permissions:
+  actions: write # Required for cache management
+
+jobs:
+  clear-cache:
+    name: Clear cache
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Clear cache
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        with:
+          script: |
+            console.log("Starting cache cleanup...")
+            const caches = await github.rest.actions.getActionsCacheList({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+            })
+
+            let deletedCount = 0
+            for (const cache of caches.data.actions_caches) {
+              console.log(`Deleting cache: ${cache.key} (${cache.size_in_bytes} bytes)`)
+              try {
+                await github.rest.actions.deleteActionsCacheById({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  cache_id: cache.id,
+                })
+                deletedCount++
+              } catch (error) {
+                console.error(`Failed to delete cache ${cache.key}: ${error.message}`)
+              }
+            }
+            console.log(`Cache cleanup completed. Deleted ${deletedCount} caches.`)