fix: add request_upgrades.py to image, add web dashboard

- Dockerfile: add COPY for request_upgrades.py (was missing — root cause
  of Monday upgrade CronJob failing with 'No such file'), add git (needed
  for repo cloning in upgrade workflow), copy web.py + templates/
- requirements.txt: add fastapi, uvicorn, jinja2 for web dashboard
- web.py: FastAPI dashboard with image inventory and upgrade trigger pages
- templates/: base layout, images page (namespace→app→container grouped
  with live version status), upgrade page (outdated list + trigger button
  + job history)
- kubernetes/web-deployment.yaml: Deployment + LoadBalancer at 192.168.87.13
- kubernetes/rbac.yaml: add version-tracker-web ServiceAccount, ClusterRole
  (read pods/deployments/replicasets/statefulsets/daemonsets/jobs/cronjobs),
  and namespace Role to create upgrade Jobs
- kubernetes/upgrade-cronjob.yaml: fix YAML indentation bug on GITEA_USERNAME
  and GITEA_COMMITTER_NAME env vars

kubernetes/rbac.yaml

@@ -1,4 +1,5 @@
 ---
+# ── version-tracker: read-only pod/namespace lister (weekly report) ──────────
 apiVersion: v1
 kind: ServiceAccount
 metadata:
@@ -6,7 +7,6 @@ metadata:
   namespace: k8s-version-tracker
 
 ---
-# Cluster-wide read access to list pods in all namespaces
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
@@ -29,3 +29,93 @@ subjects:
   - kind: ServiceAccount
     name: version-tracker
     namespace: k8s-version-tracker
+
+---
+# ── upgrade-requester: read-only pod lister (upgrades go through GitOps/ArgoCD) ─
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: upgrade-requester
+  namespace: k8s-version-tracker
+
+---
+# Reuse the same read-only ClusterRole — no direct workload patching needed.
+# Image updates are committed to argocd-gitops and ArgoCD syncs automatically.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: upgrade-requester
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: version-tracker-reader
+subjects:
+  - kind: ServiceAccount
+    name: upgrade-requester
+    namespace: k8s-version-tracker
+
+---
+# ── version-tracker-web: dashboard service account ───────────────────────────
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: version-tracker-web
+  namespace: k8s-version-tracker
+
+---
+# Cluster-wide read access: pods, namespaces, and workload owners (to map pods → apps)
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: version-tracker-web-reader
+rules:
+  - apiGroups: [""]
+    resources: ["pods", "namespaces"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["apps"]
+    resources: ["deployments", "replicasets", "statefulsets", "daemonsets"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["batch"]
+    resources: ["jobs", "cronjobs"]
+    verbs: ["get", "list", "watch"]
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: version-tracker-web-reader
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: version-tracker-web-reader
+subjects:
+  - kind: ServiceAccount
+    name: version-tracker-web
+    namespace: k8s-version-tracker
+
+---
+# Namespace-scoped: create upgrade Jobs in this namespace only
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: upgrade-trigger
+  namespace: k8s-version-tracker
+rules:
+  - apiGroups: ["batch"]
+    resources: ["jobs"]
+    verbs: ["create", "get", "list", "watch"]
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: upgrade-trigger
+  namespace: k8s-version-tracker
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: upgrade-trigger
+subjects:
+  - kind: ServiceAccount
+    name: version-tracker-web
+    namespace: k8s-version-tracker