Process different client requests uniquely.

[lincmba]

Identify client using keycloak roles Process different client requests differently fixes https://github.com/onaio/fhir-gateway-extension/issues/50

IMPORTANT: Where possible all PRs must be linked to a Github issue

Resolves [link to issue]

Engineer Checklist

• [x] I have written Unit tests for any new feature(s) and edge cases for bug fixes
• [x] I have added documentation for any new feature(s) and configuration option(s) on the README.md
• [x] I have run mvn spotless:check to check my code follows the project's style guide
• [x] I have run mvn clean test jacoco:report to confirm the coverage report was generated at plugins/target/site/jacoco/index.html
• [x] I ran mvn clean package right before creating this pull request.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 92.85714% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 44.31%. Comparing base (d7eeb69) to head (30f918b). Report is 8 commits behind head on main.

Files	Patch %	Lines
...ister/fhir/gateway/plugins/SyncAccessDecision.java	92.30%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #59 +/- ## ============================================ + Coverage 43.81% 44.31% +0.49% - Complexity 106 112 +6 ============================================ Files 15 15 Lines 1075 1090 +15 Branches 120 126 +6 ============================================ + Hits 471 483 +12 Misses 545 545 - Partials 59 62 +3 ```

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