chore: standardize CI/CD maintenance and infrastructure cleanup

.gitea/workflows/deploy.yml

@@ -37,6 +37,13 @@ jobs:
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
+      - name: 🧹 Maintenance (High Density Cleanup)
+        shell: bash
+        run: |
+          echo "Purging old build layers and dangling images..."
+          docker image prune -f
+          docker builder prune -f --filter "until=6h"
+
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
@@ -284,6 +291,10 @@ jobs:
           
           ssh root@alpha.mintel.me "docker system prune -f --filter 'until=24h'"
 
+      - name: 🧹 Post-Deploy Cleanup (Runner)
+        if: always()
+        run: docker builder prune -f --filter "until=1h"
+
   # ──────────────────────────────────────────────────────────────────────────────
   # JOB 5: Notifications
   # ──────────────────────────────────────────────────────────────────────────────