feat(attributes): Add browser.bfcache.* attributes

[logaretm]

Registers the four browser.bfcache.* attributes emitted by the new bfcacheMetricsIntegration in the JS SDK (getsentry/sentry-javascript#22397).

They describe browser back/forward-cache health metrics.

Attribute	Description
browser.bfcache.outcome	hit/miss of a back/forward navigation.
browser.bfcache.reason	A browser-reported not-restored reason (one per reason; a single miss can have several; Chromium-only via notRestoredReasons).
browser.bfcache.frame	Which frame the reason came from (top/child).
browser.bfcache.not_restored_reason_count	Number of reported reasons (0 when the browser reported none, e.g. non-Chromium).

All are Sentry-specific, so is_in_otel: false and PII is not applicable here.

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

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Breaking Changes 🛠

• (op) Add gen_ai prefix to existing ops and add embeddings, generate_content, and rerank ops by msonnb in #543

New Features ✨

Attributes

• Add browser.bfcache.* attributes by logaretm in #513

• Add query, deprecated in favor of db.query.text by alexander-alderman-webb in #530
• Add aws.operation_name, deprecated in favor of rpc.method by alexander-alderman-webb in #536
• Add db.params, deprecated in favor of db.query.parameter.<key> by alexander-alderman-webb in #529
• Add code, deprecated in favor of rpc.response.status_code by alexander-alderman-webb in #533
• Add django.function_name, deprecated in favor of code.function.name by alexander-alderman-webb in #538
• Add port, deprecated in favor of server.port by alexander-alderman-webb in #532
• Add redis.command, deprecated in favor of db.operation.name by alexander-alderman-webb in #531
• Add address, deprecated in favor of server.address by alexander-alderman-webb in #534
• Add aws_region, deprecated in favor of cloud.region by alexander-alderman-webb in #537
• Add gcp_region, deprecated in favor of cloud.region by alexander-alderman-webb in #535
• Add django.middleware_name (deprecated) in favor of middleware.name by alexander-alderman-webb in #520
• Add starlite.middleware_name (deprecated) in favor of middleware.name by alexander-alderman-webb in #519
• Add aws.request.url (deprecated) in favor of url.full by sentrivana in #488
• Add subprocess.pid (deprecated) in favor of process.pid by sentrivana in #487
• Add litestar.middleware_name (deprecated) in favor of middleware.name by sentrivana in #486
• Add starlette.middleware_name (deprecated) in favor of middleware.name by sentrivana in #485
• Add redis.key (deprecated) in favor of db.redis.key by sentrivana in #484
• Add db.mongodb.collection (deprecated) in favor of db.collection.name by sentrivana in #483
• Add Kafka messaging attributes by chargome in #474
• Deprecate rpc.grpc.status_code in favor of rpc.response.status_code by lucas-zimerman in #494
• Add deprecated messaging.destination_kind by andreiborza in #509
• Add sentry.segment.name.source attribute by Lms24 in #466
• Add attribute transformations by constantinius in #465
• Add stable app vitals attributes by buenaflor in #493
• Deprecate sentry.frames.* attributes by buenaflor in #500
• Add missing AI legacy aliases from Relay SpanData by vgrozdanic in #498

Op

• Add general measure span operation by msonnb in #550
• Add browser resource, timing phase, and UI span operations by msonnb in #547
• Add object storage span operations by msonnb in #545
• Add http.client.stream op by msonnb in #544

Other

• (conventions) Support multiple examples by Lms24 in #505
• (descriptions) Add http.route description template for http.server span description inference by Lms24 in #518

Internal Changes 🔧

Attribute

• Add more examples for valid sentry.kind values by Lms24 in #517
• Improve db.statement example and add deprecation reason by Lms24 in #501

Attributes

• Disambiguate http.route and url.template attributes by Lms24 in #521
• Improve description of sentry.segment.name.source by Lms24 in #511
• Deprecate sentry.span.source and change backfill status of sentry.source by Lms24 in #510

Deps

• Bump postcss from 8.5.15 to 8.5.25 by dependabot in #549
• Bump dompurify from 3.4.11 to 3.4.12 by dependabot in #525
• Bump fast-uri from 3.1.2 to 3.1.4 by dependabot in #526
• Bump svgo from 4.0.1 to 4.0.2 by dependabot in #524
• Bump js-yaml from 4.2.0 to 4.3.0 by dependabot in #516
• Bump astro from 6.4.7 to 7.1.0 in /docs by dependabot in #514

Other

• (attrs) Backport attributes and normalizations from Relay by Dav1dde in #497
• (codeowners) Assign telemetry-experience to gen_ai/ai attributes by vgrozdanic in #506
• (deps-dev) Bump tar from 7.5.16 to 7.5.19 by dependabot in #515
• (release) Show version in workflow run title by constantinius in #504

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[Lms24]

The attribute names look very reasonable to me, so no objections to adding them from my end! We should adjust the apply_scrubbing behaviour though (see comment).

[Lms24]

Suggested change

	"key": "never"
	"key": "manual"

I 100% agree that Pii isnt a concern here but we should only set never if product functionality would break if the attribute value got scrubbed. Which I think isn't the case. It would break created BF-cache dashboards but users would have to do their part for this to happen. So I'd suggest we set "manual". Meaning if users configure this field to be scrubbed (for whatever reason) it will be scrubbed. Otherwise, it will be left as-is. More details: https://develop.sentry.dev/engineering-practices/sentry-conventions/#before-opening-a-pr

[logaretm]

Ah okay, thanks for the clarification!

[logaretm]

Updated in 8a15474