[Al-assad]

What problem does this PR solve?

Native DorisCluster Services and StatefulSets have non-controller owner references, so the default Owns handlers miss their resource events. A deleted FE Service can remain absent. Separately, a manually changed BE replica count can be hidden by an unchanged cached hash annotation.

Accept matching non-controller owners without changing existing resource metadata. In the native BE controller, verify the observed replica count after the existing hash and legacy-environment comparison. The shared comparator, CN autoscaling and DDC comparison paths remain unchanged.

Release note

Restore event-driven reconciliation of legacy-owned native Doris resources and correction of BE replica drift.

Check List (For Author)

• Test
  • Regression test
  • Unit Test
  • Manual test
• Behavior changed:
  • Yes. Matching legacy-owned Service/StatefulSet events now enqueue their DorisCluster; native BE replicas are restored to the CR value.
• Does this need documentation?
  • No.

Validation:

• go test ./... -count=1 with Kubernetes 1.31 envtest assets.
• go vet ./...; generated manifests/deepcopy check.
• Real API-server watch regression starts with pre-existing non-controller-owned resources, then verifies Service deletion and StatefulSet update events. Unowned resources do not enqueue a CR.
• BE fake-client regression covers upward/downward replica drift with an unchanged hash, normal scaling, creation, repeated comparisons, and legacy environment compatibility. Replica-only updates preserve the Pod template.

Manual Kubernetes upgrade regression (master fix):

• Start with an existing native DorisCluster created by a prior operator, preserving non-controller owners. The old operator leaves a deleted FE Service absent for 30 seconds and a BE replica drift uncorrected for 31 seconds.
• Upgrade to the fixed operator: inherited drift is corrected; a subsequent Service deletion is recovered in about 0.8 seconds and a subsequent BE replica drift in about 0.9 seconds, with the cached hash unchanged.
• Original FE/BE Pod UIDs and restart counts, StatefulSet Pod templates, and original PVC identities remain unchanged. A seeded table remains queryable through the recovered Service.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label