fix(spring): [Cache Tracing 11] Skip cache span data when child span is NoOp

[adinauer]

PR Stack (Cache Tracing)

• #5172 — Add SentryCacheWrapper and SentryCacheManagerWrapper
• #5173 — Add enableCacheTracing option
• #5174 — Add BeanPostProcessor and auto-configuration
• #5175 — Add cache tracing e2e sample
• #5179 — Add SentryJCacheWrapper for JCache (JSR-107)
• #5182 — Add JCache console sample
• #5183 — Add cache tracing to all Spring Boot 4 samples
• #5184 — Add retrieve() overrides for reactive/async cache support
• #5190 — Port cache tracing to Spring Boot 3 Jakarta + samples
• #5191 — Port cache tracing to Spring Boot 2 + samples
• This PR — Skip cache span data when child span is NoOp

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📜 Description

Add span.isNoOp() check after startChild() in the startSpan() helper method of all three Spring SentryCacheWrapper variants (sentry-spring, sentry-spring-7, sentry-spring-jakarta). This matches the existing pattern in SentryJCacheWrapper, which already had this check.

Without this fix, when sampling drops a span, the wrapper still sets span data (cache.key, etc.) on the noop span unnecessarily.

💡 Motivation and Context

The JCache wrapper (SentryJCacheWrapper) correctly returns null when the child span is a NoOp (e.g. due to sampling), skipping all span data decoration. The three Spring cache wrappers were missing this check, creating an inconsistency and doing unnecessary work on noop spans.

💚 How did you test it?

Code review — the change is minimal and mirrors the existing JCache pattern exactly.

📝 Checklist

• I added GH Issue ID & Linear ID
• 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.
• I updated the wizard 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

None — this is a small consistency fix.

⚠️ Merge this PR using a merge commit (not squash). Only the collection branch is squash-merged into main.

#skip-changelog

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

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[sentry]

Sentry Build Distribution

App Name	App ID	Version	Configuration	Install Page
SDK Size	io.sentry.tests.size	8.34.1 (1)	release	Install Build

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	325.98 ms	412.96 ms	86.98 ms
Size	0 B	0 B	0 B

Baseline results on branch: feat/cache-tracing-spring-boot-2

Startup times

Revision	Plain	With Sentry	Diff
c3e99d4	312.46 ms	388.79 ms	76.33 ms

App size

Revision	Plain	With Sentry	Diff
c3e99d4	0 B	0 B	0 B