technical accuracy pass: kubelet/runtime split, image vs container layer, exit 137 = SIGKILL, ArgoCD maps helm hooks, selfHeal/prune opt-in, scoped absolutes (reviewer findings)

pilot/manifest-docker.json

@@ -6,7 +6,7 @@
   {
    "name": "base",
    "title": "Base image",
-   "blurb": "The OS layer everything else is stacked on. Pull it once, share it across every image on the host.",
+   "blurb": "The foundation everything stacks on. Layers are content-addressed - an identical layer is stored once and reused by every image that references it.",
    "z": 0,
    "points": [
     [
@@ -144,7 +144,7 @@
   {
    "name": "writable",
    "title": "Writable layer",
-   "blurb": "Created fresh per container, thrown away when it dies. Anything written here is not in the image.",
+   "blurb": "NOT part of the image. The runtime adds it when it creates the container, and discards it when that container dies.",
    "z": 0,
    "points": [
     [