fix: remove blocking waits during deletion

[vprashar2929]

Replace blocking wait.PollUntilContextTimeout with non-blocking check-and-requeuepattern in Deleter reconciler. This reduces PowerMonitor CR deletion time from5+ minutes to under 30 seconds by allowing Kubernetes GC to run in parallelinstead of sequentially polling for each resource deletion.

Changes:

• Refactor Deleter to use check-and-requeue instead of blocking polls
• Remove WaitTimeout field from Deleter (no longer needed)
• Update Deleter tests for non-blocking behavior
• Remove 2-minute namespace deletion wait in PowerMonitorInternal cleanup

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.60%. Comparing base (329e01d) to head (0a10f78).
⚠️ Report is 27 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #653      +/-   ##
==========================================
+ Coverage   78.89%   79.60%   +0.71%     
==========================================
  Files          11       11              
  Lines        1085     1074      -11     
==========================================
- Hits          856      855       -1     
+ Misses        199      191       -8     
+ Partials       30       28       -2     

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[vprashar2929]

codecov can be ignored since it is for error paths

[vimalk78]

doesn't having blocking behavior guarantees operation ordering. with non-blocking need to manage state more carefully

[vprashar2929]

doesn't having blocking behavior guarantees operation ordering. with non-blocking need to manage state more carefully

The ordering is safe because all resources that are suppose to delete during cleanup have owner references. Even if the Finalizer proiceeds before deletion GC handles and deletes any remaining dependents so no resources are left behind

[vimalk78]

please do a Claude Code review of this PR. this needs more changes

[vprashar2929]

Can you share your review analysis?

[vprashar2929]

Specifically changes that are required

[vprashar2929]

@vimalk78 Can you re-review it? Thanks 🙏