chore: fix noisy operator logs

[andreasgerstmayr]

• "certificate rotation completed" and "discovered Kubernetes API server endpoints" was printed at every TempoStack reconcile
• public port name was used twice in the gateway pod, triggering a duplicate port name warning in the logs

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 59.53%. Comparing base (0b0e615) to head (1826ae8).
⚠️ Report is 199 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/certrotation/handlers/rotate_certs.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1574      +/-   ##
==========================================
+ Coverage   57.64%   59.53%   +1.88%     
==========================================
  Files         121      135      +14     
  Lines       11277    10947     -330     
==========================================
+ Hits         6501     6517      +16     
+ Misses       4418     4041     -377     
- Partials      358      389      +31     

Flag	Coverage Δ
unittests	59.53% <75.00%> (+1.88%)	⬆️

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