chore(images): pin service image updates

Replace floating service images with reviewable tags or digests.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

glance/compose.yaml

@@ -1,7 +1,7 @@
 services:
   glance:
     container_name: glance
-    image: glanceapp/glance
+    image: glanceapp/glance:v0.8.6
     restart: unless-stopped
     volumes:
       - ./config:/app/config:ro

glance/k8s/glance.yaml

@@ -27,7 +27,7 @@ spec:
     spec:
       containers:
         - name: glance
-          image: glanceapp/glance
+          image: glanceapp/glance:v0.8.6
           envFrom:
             - secretRef:
                 name: glance-secrets