[Metrics] Adding support to Success rate metrics

[fhibf]

Description

Adding support to success rate metrics.

Related issues

Addresses AB#191386.

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• Tag the PR with Schema Version backward compatible or Schema Version backward incompatible or Schema Version unchanged if this adds or updates Sql script which is/is not backward compatible with the code.
• When changing or adding behavior, if your code modifies the system design or changes design assumptions, please create and include an ADR.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch|Skip|Feature|Breaking (reason)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.23%. Comparing base (6faa795) to head (9bfcccb).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5555      +/-   ##
==========================================
- Coverage   77.63%   77.23%   -0.41%     
==========================================
  Files         985      993       +8     
  Lines       36189    36253      +64     
  Branches     5498     5500       +2     
==========================================
- Hits        28097    28001      -96     
- Misses       6738     6900     +162     
+ Partials     1354     1352       -2     

see 32 files with indirect coverage changes

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