Kubernetes: advanced scheduling — node/inter-pod affinity, topology spread, scoring, tolerationSeconds/eviction

[NitinKumar004]

Deferred from #875 (multi-node v1 shipped nodeSelector/taints/tolerations/requests first-fit + per-node DaemonSet fan-out via --k8s-nodes). Not modeled: node & inter-pod (anti)affinity (requiredDuring/preferredDuring), topology spread constraints, scoring/bin-packing (v1 is deterministic first-fit lowest-name), and tolerationSeconds/live NoExecute eviction. Fix locus: services/kubernetes/node.go scheduleNodeLocked.

[NitinKumar004]

Node/inter-pod affinity + anti-affinity, topology spread (DoNotSchedule), and preferred-weight scoring shipped in #925 (merged). NoExecute taint-based eviction + tolerationSeconds (needs a background eviction-controller loop) were deliberately deferred — leaving this open for that piece.