REFACTOR(secrets): flatten Vault paths

- Change secret paths from <category>/<app> to <app>
- applications/code-server → code-server
- applications/umami → umami
- databases/postgresql → postgresql
- cluster-infrastructure/authelia → authelia

code-server/manifests/secret.yaml

@@ -14,5 +14,5 @@ spec:
   data:
     - secretKey: password
       remoteRef:
-        key: applications/code-server
+        key: code-server
         property: PASSWORD

immich/manifests/secret.yaml

@@ -14,7 +14,7 @@ spec:
   data:
     - secretKey: password
       remoteRef:
-        key: databases/postgresql
+        key: postgresql
         property: PASSWORD
 
 ---
@@ -34,5 +34,5 @@ spec:
   data:
     - secretKey: OAUTH_CLIENT_SECRET
       remoteRef:
-        key: cluster-infrastructure/authelia
+        key: authelia
         property: IMMICH_CLIENT_SECRET

umami/manifests/secret.yaml

@@ -14,9 +14,9 @@ spec:
   data:
     - secretKey: database-url
       remoteRef:
-        key: applications/umami
+        key: umami
         property: DATABASE_URL
     - secretKey: hash-salt
       remoteRef:
-        key: applications/umami
+        key: umami
         property: HASH_SALT