Fix/22 mark current session correctly

[NirmalMishra08]

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• I have read and signed the CLA by commenting I have read the CLA and agree to its terms. on this PR.
• My changes follow the project's coding style.
• I have tested my changes.

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⚙️ Run configuration

Configuration used: defaults

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Run ID: 15a4b34b-2913-4d5c-bda7-ebb4b92812a6

📥 Commits

Reviewing files that changed from the base of the PR and between de8755b and c79cb1b.

📒 Files selected for processing (10)

• cmd/oauth-test-client/main.go
• internal/config/redis.go
• internal/handler/auth_handler.go
• internal/handler/auth_handler_protected_test.go
• internal/handler/auth_handler_test.go
• internal/middleware/auth.go
• internal/repository/token_repository.go
• internal/service/auth_service.go
• internal/service/token_service.go
• internal/service/token_service_test.go

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[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[NirmalMishra08]

Hi @roshankumar0036singh,

I've addressed the review comments and pushed the updates.

Updated the session tests to verify that the session corresponding to the request token is marked as current.
Added test coverage for the case where sessionID is missing from the request context.
Removed the unused test variable.
Updated the refresh token rotation flow to use a transaction so the creation of the new refresh token and revocation of the old token happen atomically, avoiding inconsistent session state.

I've also run the tests locally and everything is passing. Could you please take another look when you have time? Thanks!