fix: Removing more RxJava

[kennethjor]

No description provided.

[netlify]

✅ Deploy Preview for everef-docs canceled.

Name	Link
🔨 Latest commit	8ce36ea
🔍 Latest deploy log	https://app.netlify.com/projects/everef-docs/deploys/68eca59a4159180008c6fbee

[sonarqubecloud]

Quality Gate passed

Issues
7 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

[cloudflare-workers-and-pages]

Deploying eve-ref with    Cloudflare Pages

Latest commit:	8ce36ea
Status:	✅  Deploy successful!
Preview URL:	https://1ad93ed6.eve-ref.pages.dev
Branch Preview URL:	https://remove-rxjava.eve-ref.pages.dev

View logs

[codecov]

Codecov Report

❌ Patch coverage is 53.73134% with 31 lines in your changes missing coverage. Please review.
✅ Project coverage is 76%. Comparing base (e41e800) to head (8ce36ea).
⚠️ Report is 99 commits behind head on main.

Files with missing lines	Patch %	Lines
...java/com/autonomouslogic/everef/esi/EsiHelper.java	42%	11 Missing ⚠️
.../com/autonomouslogic/everef/util/ParallelUtil.java	55%	8 Missing and 1 partial ⚠️
...om/autonomouslogic/everef/util/VirtualThreads.java	57%	5 Missing and 1 partial ⚠️
...logic/everef/s3/HeadObjectFlowableTransformer.java	72%	3 Missing ⚠️
.../java/com/autonomouslogic/everef/s3/S3Adapter.java	33%	2 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##             main   #971   +/-   ##
=====================================
- Coverage      76%    76%   -1%     
- Complexity   2183   2185    +2     
=====================================
  Files         219    220    +1     
  Lines        8635   8670   +35     
  Branches      668    671    +3     
=====================================
+ Hits         6604   6615   +11     
- Misses       1676   1700   +24     
  Partials      355    355           

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