Use ThreadLocalAccessor for WebClient in Spring Boot 3 sample

[adinauer]

#skip-changelog

📜 Description

Use ThreadLocalAccessor for WebClient in Spring Boot 3 sample

💡 Motivation and Context

To showcase how it can be used.

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against d3f277b

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	356.08 ms	382.81 ms	26.73 ms
Size	1.73 MiB	2.34 MiB	626.30 KiB

Baseline results on branch: feat/use-thread-local-accessor-in-webflux-sample

Startup times

Revision	Plain	With Sentry	Diff
2e82a91	301.84 ms	359.88 ms	58.04 ms
02d7ab6	307.38 ms	333.83 ms	26.45 ms
09f597a	284.63 ms	359.79 ms	75.16 ms

App size

Revision	Plain	With Sentry	Diff
2e82a91	1.73 MiB	2.34 MiB	626.30 KiB
02d7ab6	1.73 MiB	2.34 MiB	626.30 KiB
09f597a	1.73 MiB	2.34 MiB	626.30 KiB

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (9a2d1a4) 80.35% compared to head (bd5f90e) 80.35%.

❗ Current head bd5f90e differs from pull request most recent head d3f277b. Consider uploading reports for the commit d3f277b to get more accurate results

Additional details and impacted files

@@                                 Coverage Diff                                 @@
##             feat/use-thread-local-accessor-in-webflux-sample    #2568   +/-   ##
===================================================================================
  Coverage                                               80.35%   80.35%           
  Complexity                                               4011     4011           
===================================================================================
  Files                                                     332      332           
  Lines                                                   15148    15148           
  Branches                                                 1979     1979           
===================================================================================
  Hits                                                    12172    12172           
  Misses                                                   2197     2197           
  Partials                                                  779      779           

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