impl(pubsub): update last extension for successful extend

[PhongChuong]

Lease state propagate extension results back to LeaseLoop using by the LeaseEvent ExtendCompleted and ExtendCompletedEO. The result are used to update the last extension value in the lease state.

Fixes: #5048

[codecov]

Codecov Report

❌ Patch coverage is 97.40260% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.75%. Comparing base (8ca77e7) to head (2b1d950).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/pubsub/src/subscriber/lease_state.rs	93.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5530      +/-   ##
==========================================
- Coverage   97.76%   97.75%   -0.01%     
==========================================
  Files         218      218              
  Lines       49498    49555      +57     
==========================================
+ Hits        48390    48443      +53     
- Misses       1108     1112       +4     

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