Revert "fix(monitoring): tempo OOMKilled — move resources under tempo.resources"

This reverts commit a02782d11f.

stacks/monitoring/modules/monitoring/tempo.yaml

@@ -22,17 +22,15 @@ tempo:
   # Tempo query/HTTP API — the Grafana datasource URL targets this (3100).
   server:
     http_listen_port: 3100
-  # Container resources — the single-binary chart key is tempo.resources (NOT a
-  # top-level `resources:`). With it mis-placed the pod fell to the namespace
-  # LimitRange default and was OOMKilled (exit 137); set it explicitly here.
-  resources:
-    requests:
-      cpu: 100m
-      memory: 256Mi
-    limits:
-      memory: 2Gi
 
 persistence:
   enabled: true
   size: 20Gi
   storageClassName: proxmox-lvm
+
+resources:
+  requests:
+    cpu: 100m
+    memory: 256Mi
+  limits:
+    memory: 1Gi