4.x: Cleanup; build, safevarargs, small typos

[akarnokd]

• Fix 'cancelled' to 'canceled'
• Fix unnecessary @SafeVarargs with CompletableSource....
• Add Gradle test timeout of 30 minutes
• Cleanup build.gradle redundancies and deprecations

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 5.083 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/gradle_branch.yml: 5.083
.github/workflows/gradle_pr.yml: 4.933
.github/workflows/gradle_preview_jdks.yml: 5.129
.github/workflows/gradle_release.yml: 5.211
.github/workflows/gradle_snapshot.yml: 5.059

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊

[codecov]

Codecov Report

❌ Patch coverage is 69.23077% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.33%. Comparing base (a23d855) to head (bf4421f).

Files with missing lines	Patch %	Lines
...ctivex/rxjava4/core/CompletionStageDisposable.java	33.33%	2 Missing ⚠️
...ain/java/io/reactivex/rxjava4/core/Streamable.java	0.00%	1 Missing ⚠️
...nternal/schedulers/SchedulerToExecutorService.java	50.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (69.23%) is below the target coverage (95.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##                4.x    #8183      +/-   ##
============================================
- Coverage     98.33%   98.33%   -0.01%     
+ Complexity     6938     6934       -4     
============================================
  Files           785      785              
  Lines         49003    48999       -4     
  Branches       6603     6599       -4     
============================================
- Hits          48187    48182       -5     
+ Misses          625      622       -3     
- Partials        191      195       +4     

☔ View full report in Codecov by Harness.
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[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 5.083 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/gradle_branch.yml: 5.083
.github/workflows/gradle_pr.yml: 4.933
.github/workflows/gradle_preview_jdks.yml: 5.129
.github/workflows/gradle_release.yml: 5.211
.github/workflows/gradle_snapshot.yml: 5.059

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 5.083 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/gradle_branch.yml: 5.083
.github/workflows/gradle_pr.yml: 4.933
.github/workflows/gradle_preview_jdks.yml: 5.129
.github/workflows/gradle_release.yml: 5.211
.github/workflows/gradle_snapshot.yml: 5.059

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 5.083 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/gradle_branch.yml: 5.083
.github/workflows/gradle_pr.yml: 4.933
.github/workflows/gradle_preview_jdks.yml: 5.129
.github/workflows/gradle_release.yml: 5.211
.github/workflows/gradle_snapshot.yml: 5.059

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 5.083 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/gradle_branch.yml: 5.083
.github/workflows/gradle_pr.yml: 4.933
.github/workflows/gradle_preview_jdks.yml: 5.129
.github/workflows/gradle_release.yml: 5.211
.github/workflows/gradle_snapshot.yml: 5.059

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊