Refresh v3 implementation

[marceloneppel]

Issue

Solution

Checklist

• I have added or updated any relevant documentation.
• I have cleaned any remaining cloud resources from my accounts.

[codecov]

Codecov Report

❌ Patch coverage is 39.69072% with 117 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.88%. Comparing base (48d4eb4) to head (46eac97).
⚠️ Report is 6 commits behind head on 16/edge.

Files with missing lines	Patch %	Lines
src/charm.py	37.30%	66 Missing and 13 partials ⚠️
src/refresh.py	41.93%	17 Missing and 1 partial ⚠️
src/relations/async_replication.py	47.05%	8 Missing and 1 partial ⚠️
src/relations/postgresql_provider.py	10.00%	9 Missing ⚠️
src/relations/logical_replication.py	0.00%	2 Missing ⚠️

❌ Your project check has failed because the head coverage (65.88%) is below the target coverage (70.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           16/edge    #1115      +/-   ##
===========================================
- Coverage    67.44%   65.88%   -1.57%     
===========================================
  Files           18       18              
  Lines         3947     3904      -43     
  Branches       564      567       +3     
===========================================
- Hits          2662     2572      -90     
- Misses        1112     1148      +36     
- Partials       173      184      +11     

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