OLM v1 ClusterExtension upgrade from RHDH operator 1.6.3 to 1.7.0 fails due to CRD upgrade safety validation blocking "unhandled changes" for additive schema modifications. The validation incorrectly treats the addition of optional fields and description text changes as breaking changes, preventing legitimate upgrades. 

- OpenShift Container Platform: 4.20.0-0.nightly-2025-08-18-192426
- OLM v1: olm.operatorframework.io/v1 (GA)
- RHDH Operator: 1.6.3 → 1.7.0 upgrade path
- Kubernetes: v1.33.3    

Always - 100% reproducible with RHDH operator upgrade from 1.6.3 to 1.7.0

1. Install RHDH operator 1.6.3 using OLM v1 ClusterExtension:
   ```
   oc apply -f - <<EOF
   apiVersion: olm.operatorframework.io/v1
   kind: ClusterExtension
   metadata:
     name: rhdh-upgrade-test
   spec:
     namespace: rhdh-upgrade-test
     serviceAccount:
       name: rhdh-installer
     source:
       sourceType: Catalog
       catalog:
         packageName: rhdh
         version: "1.6.3"
         channels: [fast-1.6]
   EOF
   ```2. Wait for installation to complete:
   ```
   oc wait --for=condition=Installed=True clusterextension/rhdh-upgrade-test --timeout=600s
   ```3. Attempt upgrade to 1.7.0:
   ```
   oc patch clusterextension rhdh-upgrade-test --type='merge' -p='{
     "spec": {
       "source": {
         "catalog": {
           "version": "1.7.0",
           "channels": ["fast-1.7"]
         }
       }
     }
   }'
   ```4. Check upgrade status:
   ```
   oc get clusterextension rhdh-upgrade-test -o jsonpath='{.status.conditions[?(@.type=="Progressing")].message}'
   ```

error for resolved bundle "rhdh-operator.v1.7.0" with version "1.7.0": validating upgrade for CRD "backstages.rhdh.redhat.com": v1alpha1 <-> v1alpha3: ^.spec.application.extraFiles.secrets: unhandled: unhandled changes found :
  &v1.JSONSchemaProps{
        ... // 21 identical fields
        MinProperties: nil,
        Required:      nil,
        Items: &v1.JSONSchemaPropsOrArray{
                Schema: &v1.JSONSchemaProps{
                        ... // 26 identical fields
                        AnyOf: nil,
                        Not:   nil,
                        Properties: map[string]v1.JSONSchemaProps{
                                "key": {Description: "Key in the object", Type: "string"},
+                               "mountPath": {
+                                       Description: "Path to mount the Object. If not specified default-path/Name will be used",
+                                       Type:        "string",
+                               },
                                "name": {
                                        ID:     "",
                                        Schema: "",
                                        Ref:    nil,
                                        Description: strings.Join({
                                                "Name of the object\n",
-                                               "We support only",
+                                               "Supported",
                                                " ConfigMaps and Secrets",
-                                               ".",
                                        }, ""),
                                        Type:   "string",
                                        Format: "",
                                        ... // 38 identical fields
                                },
                        },
                        AdditionalProperties: nil,
                        PatternProperties:    nil,
                        ... // 13 identical fields
                },
                JSONSchemas: nil,
        },
        AllOf: nil,
        OneOf: nil,
        ... // 18 identical fields
  }

v1alpha1 <-> v1alpha3: ^.spec.application.extraFiles.configMaps: unhandled: unhandled changes found :
  &v1.JSONSchemaProps{
        ... // 21 identical fields
        MinProperties: nil,
        Required:      nil,
        Items: &v1.JSONSchemaPropsOrArray{
                Schema: &v1.JSONSchemaProps{

Upgrade should succeed since the CRD changes are additive and backward compatible:
- New `mountPath` field is optional (not required)
- Description text changes are non-breaking
- No existing fields were removed or had types changed

- INSTALLED BUNDLE: rhdh-operator.v1.7.0
- VERSION: 1.7.0  
- INSTALLED: True

oc patch clusterextension rhdh-upgrade-test --type='merge' -p='{
  "spec": {
    "source": {
      "catalog": {
        "version": "1.7.0",
        "channels": ["fast-1.7"]
      }
    },
    "install": {
      "preflight": {
        "crdUpgradeSafety": {
          "enforcement": "None"
        }
      }
    }
  }
}'
clusterextension.olm.operatorframework.io/rhdh-upgrade-test patched