PERF(resources): remove CPU limits - keep memory limits only

- CPU throttling prevents app startup, not crashes
- Memory OOM is the real cascading failure cause
- CPU request ensures fair scheduling

immich/helm-values.yaml

@@ -61,7 +61,6 @@ server:
               cpu: 15m
               memory: 512Mi
             limits:
-              cpu: 45m
               memory: 768Mi
           probes:
             startup:
@@ -102,7 +101,6 @@ machine-learning:
               cpu: 15m
               memory: 1Gi
             limits:
-              cpu: 45m
               memory: 1536Mi
           probes:
             startup: