equalize memory req=lim across 70+ containers using Prometheus 7d max data

After node2 OOM incident, right-size memory across the cluster by setting
requests=limits based on max_over_time(container_memory_working_set_bytes[7d])
with 1.3x headroom. Eliminates ~37Gi overcommit gap.

Categories:
- Safe equalization (50 containers): set req=lim where max7d well within target
- Limit increases (8 containers): raise limits for services spiking above current
- No Prometheus data (12 containers): conservatively set lim=req
- Exception: nextcloud keeps req=256Mi/lim=8Gi due to Apache memory spikes

Also increased dbaas namespace quota from 12Gi to 16Gi to accommodate mysql
4Gi limits across 3 replicas.

stacks/platform/modules/cloudflared/main.tf

@@ -73,10 +73,10 @@ resource "kubernetes_deployment" "cloudflared" {
           resources {
             requests = {
               cpu    = "15m"
-              memory = "32Mi"
+              memory = "128Mi"
             }
             limits = {
-              memory = "256Mi"
+              memory = "128Mi"
             }
           }
         }