fix(k8s): remove CPU limits to resolve KubeCPUOvercommit alert

Remove cpu from resource limits while keeping memory limits and all
requests intact. CPU limits cause unnecessary throttling and
overcommit alerts when actual usage is far below limits.

k8s/deploy.yaml

@@ -60,7 +60,6 @@ spec:
             cpu: 10m
             memory: 10Mi
           limits:
-            cpu: 300m
             memory: 300Mi
 
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