fix(rdb): fix read replica service_ip to return CIDR format instead of IP only

[jremy42]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 1.77%. Comparing base (1d2fc00) to head (85d14e1).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
internal/services/rdb/types.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #3475      +/-   ##
=========================================
- Coverage    1.77%   1.77%   -0.01%     
=========================================
  Files         403     403              
  Lines       44212   44215       +3     
=========================================
- Hits          786     784       -2     
- Misses      43339   43343       +4     
- Partials       87      88       +1     

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