fix(cilium): carry policyMapMax into the bootstrap inline manifest

Addresses the blocking review finding on #495.

Raising bpf.policyMapMax only in the HelmRelease left the bootstrap path
on the old value. kubernetes/bootstrap.sh:126 passes
kubernetes/talos/patches/cilium-cni.yaml to talosctl apply-config for
every node, and that manifest hardcoded bpf-policy-map-max: "16384" — so
a cold rebuild would install Cilium with the map size this PR exists to
fix, and stay there until Flux reconciled the HelmRelease.

The sibling bpf-lb-map-max is "65536" in both files, matching the live
agent config, so keeping these in sync is the repo's existing practice.

kubernetes/talos/cilium.yaml carries the same key and is updated too.
Nothing in the repo references that file — only patches/cilium-cni.yaml
is used by bootstrap.sh — so it looks like an orphaned rendered snapshot.
Syncing it rather than deleting it: whether it should exist at all is a
separate question from this fix.

Each of the three sites now names the others, so the next change to this
value has the lockstep written down where someone will hit it.

Co-Authored-By: Claude Bot <claude-bot@renner.uno>

kubernetes/infrastructure/cilium/helmrelease.yaml

@@ -57,6 +57,9 @@ spec:
       # in sandbox creation — so this must stay comfortably above the busiest
       # endpoint's entry count, tracked by cilium_bpf_map_pressure.
       # Takes effect on agent restart; the map is sized at creation.
+      # Bootstrap installs Cilium from the inline manifest in
+      # kubernetes/talos/patches/cilium-cni.yaml, so bpf-policy-map-max there
+      # must move with this value or a cold rebuild starts with the old size.
       policyMapMax: 65536
       # Let pods reach the cluster's own LoadBalancer external IPs; Cilium
       # redirects the socket directly to the backend pod instead of sending

kubernetes/talos/cilium.yaml

@@ -302,8 +302,9 @@ data:
   # sizing of the TCP CT, non-TCP CT, NAT and policy BPF maps.
   bpf-map-dynamic-size-ratio: "0.0025"
   # bpf-policy-map-max specifies the maximum number of entries in endpoint
-  # policy map (per endpoint)
-  bpf-policy-map-max: "16384"
+  # policy map (per endpoint). Keep in lockstep with patches/cilium-cni.yaml and
+  # values.bpf.policyMapMax in kubernetes/infrastructure/cilium/helmrelease.yaml.
+  bpf-policy-map-max: "65536"
   # bpf-policy-stats-map-max specifies the maximum number of entries in global
   # policy stats map
   bpf-policy-stats-map-max: "65536"

kubernetes/talos/patches/cilium-cni.yaml

@@ -320,8 +320,11 @@ cluster:
           # sizing of the TCP CT, non-TCP CT, NAT and policy BPF maps.
           bpf-map-dynamic-size-ratio: "0.0025"
           # bpf-policy-map-max specifies the maximum number of entries in endpoint
-          # policy map (per endpoint)
-          bpf-policy-map-max: "16384"
+          # policy map (per endpoint). Keep in lockstep with values.bpf.policyMapMax
+          # in kubernetes/infrastructure/cilium/helmrelease.yaml: bootstrap installs
+          # Cilium from this inline manifest, so a lower value here means a cold
+          # rebuild comes up with a map that overflows until Flux reconciles.
+          bpf-policy-map-max: "65536"
           # bpf-policy-stats-map-max specifies the maximum number of entries in global
           # policy stats map
           bpf-policy-stats-map-max: "65536"