fix(reporter):added idempotency gate to prevent API server flooding

[LightCreator1007]

Description

Adds an idempotency gate to updateNodeCondition in the readiness-condition-reporter.
UpdateStatus is now bypassed if the Status, Reason, and Message are unchanged, preventing unnecessary API server flooding and etcd write amplification on every tick.

Related Issue

NONE

Type of Change

/kind bug

Testing

• Modified main_test.go locally to assert against the fake.Clientset's tracked actions, confirming that the UpdateStatus call is definitively bypassed when the condition state is unchanged.

Checklist

• make test passes
• make lint passes

Does this PR introduce a user-facing change?

NONE

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: LightCreator1007
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[k8s-ci-robot]

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[sahitya-chandra]

Hey @LightCreator1007, PR looks good but the diff only touches main.go, so the skip path isn't covered. Could you add a test where the node already has the matching condition and assert no update is sent?

Also, a comment noting that skipping the write stops refreshing the heartbeat (so it no longer signals the reporter is alive), would be good

[AvineshTripathi]

with the change we will miss the lastHeartbeatTime update. While this is an optional field. It is an important field to show indicating that the health check is running.

how about we add

if time.Since(existingCondition.LastHeartbeatTime.Time) >= 5*time.Minute {
  needsUpdate = true // State is unchanged, but we need to refresh the heartbeat
}

so after 5 min even if there is no update to status, we still update once for the LastHeartbeatTime?

[sahitya-chandra]

Yeah, that works well. The 5m floor keeps the heartbeat alive so it still signals the reporter is running, while skipping the redundant writes the rest of the time. +1 from me.