feat(core): [Cache Tracing 2] Add enableCacheTracing option

[adinauer]

📜 Description

Adds enableCacheTracing boolean option to SentryOptions and ExternalOptions. When disabled (the default), SentryCacheWrapper skips span creation entirely.

💡 Motivation and Context

Part of #4120

Cache tracing should be opt-in so it doesn't affect existing users. This follows the same pattern as enableDatabaseTransactionTracing.

💚 How did you test it?

• SentryOptionsTest — default value, merge behavior
• ExternalOptionsTest — property binding for enable-cache-tracing
• SentryCacheWrapperTest — no span created when option is disabled

📝 Checklist

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• No breaking change or entry added to the changelog.

🔮 Next steps

• PR 3: Add BeanPostProcessor and Spring Boot 4 auto-configuration

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

---

New Features ✨

Core

• [Cache Tracing 2] Add enableCacheTracing option by adinauer in #5141

• [Cache Tracing 2] Add enableCacheTracing option by adinauer in #5141

Spring

• [Cache Tracing 3] Add BeanPostProcessor and auto-configuration by adinauer in #5142
• [Cache Tracing 1] Add SentryCacheWrapper and SentryCacheManagerWrapper by adinauer in #5137

---

_{🤖 This preview updates automatically when you update the PR.}

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

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

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

### Features

- [Cache Tracing 2] Add enableCacheTracing option ([#5141](https://github.com/getsentry/sentry-java/pull/5141))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description or adding a skip-changelog label.

Generated by 🚫 dangerJS against 8ef6ac5

[adinauer]

PR Stack (Cache Tracing)

• #5161 — Collection PR (full diff → main)
• #5137 — Add SentryCacheWrapper and SentryCacheManagerWrapper
• #5141 — Add enableCacheTracing option
• #5142 — Add BeanPostProcessor and auto-configuration

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	285.09 ms	372.84 ms	87.75 ms
Size	1.58 MiB	2.29 MiB	722.92 KiB

Baseline results on branch: feat/cache-tracing-wrappers

Startup times

Revision	Plain	With Sentry	Diff
3e5f591	317.48 ms	356.80 ms	39.32 ms
2876c40	339.24 ms	405.65 ms	66.41 ms

App size

Revision	Plain	With Sentry	Diff
3e5f591	0 B	0 B	0 B
2876c40	1.58 MiB	2.29 MiB	723.29 KiB