fix: harden SeaweedFS storage and fix Drive presigned uploads

- SeaweedFS filer: Recreate strategy (prevents LevelDB lock contention),
  60s termination grace period, memory 256Mi→2Gi limit
- SeaweedFS volume: 60s termination grace period, memory 256Mi→1Gi limit
- Drive: add AWS_S3_DOMAIN_REPLACE so presigned upload URLs use
  s3.sunbeam.pt instead of internal cluster DNS
- Drive: relax liveness/readiness probes (failureThreshold 1→3,
  period 1s→10s, timeout 1s→5s) to prevent crash loops under load

overlays/production/values-resources.yaml

@@ -126,10 +126,10 @@ spec:
         - name: filer
           resources:
             requests:
-              memory: 256Mi
+              memory: 512Mi
               cpu: 100m
             limits:
-              memory: 1Gi
+              memory: 2Gi
 
 ---
 apiVersion: apps/v1