feat(http): [Data Collection 11] Apply response header policy

[adinauer]

PR Stack (Data Collection)

• feat(core): Data Collection #5759
• feat(core): [Data Collection 1] Add configuration types #5760
• feat(core): [Data Collection 2] Expose SentryOptions API #5761
• feat(core): [Data Collection 3] Add policy resolver #5799
• feat(graphql): [Data Collection 4] Apply GraphQL policies #5800
• feat(database): [Data Collection 5] Apply query policy #5801
• feat(spring): [Data Collection 6] Apply incoming request body policy #5802
• feat(apollo): [Data Collection 7] Apply incoming response body policy #5803
• feat(apollo): [Data Collection 8] Apply outgoing request body policy #5804
• feat(graphql): [Data Collection 9] Apply outgoing response body policy #5805
• feat(http): [Data Collection 10] Apply request header policy #5806
• feat(http): [Data Collection 11] Apply response header policy #5807

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📜 Description

Apply the response-header Data Collection policy to OkHttp, Ktor, and Apollo 3/4 failed-request events.

Explicit Data Collection supports off, deny-list, and allow-list behavior with canonical sensitive-key filtering. When Data Collection is absent, sendDefaultPii=false continues to omit response headers and sendDefaultPii=true continues to collect headers while omitting legacy-sensitive names.

💡 Motivation and Context

These are the current global response-header consumers. Central filtering provides granular response-header control while preserving historical behavior for applications that have not opted into Data Collection. Session Replay network headers remain governed by Replay-specific integration controls.

Refs #5666

💚 How did you test it?

• ./gradlew spotlessApply apiDump
• Full OkHttp, Ktor, Apollo 3, and Apollo 4 tests
• git diff --check

📝 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

Migrate cookie and query-parameter collection and coordinate Replay inheritance from global Data Collection policies.

#skip-changelog

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

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

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📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.48.0 (1)	release

⚙️ sentry-android Build Distribution Settings

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Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	420.65 ms	465.46 ms	44.81 ms
Size	0 B	0 B	0 B