fix: Prevent errors when being used as a dependency (#1173)

See losisin/helm-values-schema-json#254 for
further context

Author: DiamondJoseph

helm/blueapi/README.md

@@ -12,6 +12,7 @@ A Helm chart deploying a worker pod that runs Bluesky plans
 | debug.enabled | bool | `false` | If enabled, disables liveness and readiness probes, and does not start the service on startup This allows connecting to the pod and starting the service manually to allow debugging on the cluster |
 | extraEnvVars | list | `[]` | Additional envVars to mount to the pod |
 | fullnameOverride | string | `""` |  |
+| global | object | `{}` | Not used, but must be present for validation when using as a dependency of another chart |
 | hostNetwork | bool | `false` | May be needed for EPICS depending on gateway configuration |
 | image.pullPolicy | string | `"IfNotPresent"` |  |
 | image.repository | string | `"ghcr.io/diamondlightsource/blueapi"` | To use a container image that extends the blueapi one, set it here |

helm/blueapi/values.schema.json

@@ -24,6 +24,10 @@
         "fullnameOverride": {
             "type": "string"
         },
+        "global": {
+            "description": "Not used, but must be present for validation when using as a dependency of another chart",
+            "type": "object"
+        },
         "hostNetwork": {
             "description": "May be needed for EPICS depending on gateway configuration",
             "type": "boolean"

helm/blueapi/values.yaml

@@ -226,3 +226,6 @@ debug:
   # -- If enabled, disables liveness and readiness probes, and does not start the service on startup
   # This allows connecting to the pod and starting the service manually to allow debugging on the cluster
   enabled: false
+
+# -- Not used, but must be present for validation when using as a dependency of another chart
+global: {}