Remove all CPU limits cluster-wide to eliminate CFS throttling

CPU limits cause CFS throttling even when nodes have idle capacity.
Move to a request-only CPU model: keep CPU requests for scheduling
fairness but remove all CPU limits. Memory limits stay (incompressible).

Changes across 108 files:
- Kyverno LimitRange policy: remove cpu from default/max in all 6 tiers
- Kyverno ResourceQuota policy: remove limits.cpu from all 5 tiers
- Custom ResourceQuotas: remove limits.cpu from 8 namespace quotas
- Custom LimitRanges: remove cpu from default/max (nextcloud, onlyoffice)
- RBAC module: remove cpu_limits variable and quota reference
- Freedify factory: remove cpu_limit variable and limits reference
- 86 deployment files: remove cpu from all limits blocks
- 6 Helm values files: remove cpu under limits sections

stacks/platform/modules/nvidia/main.tf

@@ -25,7 +25,6 @@ resource "kubernetes_resource_quota" "nvidia_quota" {
   }
   spec {
     hard = {
-      "limits.cpu"      = "32"
       "limits.memory"   = "48Gi"
       "requests.cpu"    = "8"
       "requests.memory" = "8Gi"
@@ -618,7 +617,6 @@ resource "kubernetes_daemonset" "gpu_pod_exporter" {
               memory = "128Mi"
             }
             limits = {
-              cpu              = "200m"
               memory           = "256Mi"
               "nvidia.com/gpu" = "1"
             }