Add SR support for embedded content wireframes

[jonathanmos]

What does this PR do?

Merges feature/flutter-support into develop, adding support for embedded content wireframes. This is required to support Flutter hybrid views in replays. This PR won't actually be merged until there is a final confirmation from the flutter side that this meets all requirements.

Motivation

What inspired you to submit this pull request?

Additional Notes

Anything else we should know when reviewing?

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[datadog-prod-us1-3]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 72.82%

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 10615a8 | Docs | Datadog PR Page | Give us feedback!}

[codecov-commenter]

Codecov Report

❌ Patch coverage is 85.61151% with 60 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.20%. Comparing base (3951995) to head (10615a8).
⚠️ Report is 4 commits behind head on develop.

Files with missing lines	Patch %	Lines
...droid/sessionreplay/_SessionReplayInternalProxy.kt	60.98%	2 Missing and 14 partials ⚠️
...eplay/internal/embedded/EmbeddedContentReceiver.kt	81.82%	5 Missing and 3 partials ⚠️
...ernal/recorder/mapper/EmbeddedContentViewMapper.kt	89.87%	4 Missing and 4 partials ⚠️
...oid/sessionreplay/internal/SessionReplayFeature.kt	86.96%	2 Missing and 4 partials ⚠️
...y/internal/embedded/EmbeddedContentSlotRegistry.kt	83.33%	0 Missing and 5 partials ⚠️
...ssionreplay/internal/processor/MutationResolver.kt	88.89%	2 Missing and 2 partials ⚠️
...sessionreplay/internal/processor/WireframeUtils.kt	66.67%	0 Missing and 3 partials ⚠️
...essionreplay/internal/recorder/SnapshotProducer.kt	50.00%	0 Missing and 2 partials ⚠️
...ssionreplay/internal/recorder/TreeViewTraversal.kt	81.82%	1 Missing and 1 partial ⚠️
...droid/sessionreplay/internal/utils/WireframeExt.kt	33.33%	2 Missing ⚠️
... and 4 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3701      +/-   ##
===========================================
- Coverage    73.51%   73.20%   -0.31%     
===========================================
  Files          999     1004       +5     
  Lines        36570    36928     +358     
  Branches      6183     6428     +245     
===========================================
+ Hits         26884    27033     +149     
- Misses        7980     8046      +66     
- Partials      1706     1849     +143     

Files with missing lines	Coverage Δ
.../sessionreplay/internal/DefaultRecorderProvider.kt	94.44% <100.00%> (+0.74%)	⬆️
...sionreplay/internal/SessionReplayRecordCallback.kt	100.00% <100.00%> (ø)
...replay/internal/SessionReplayRumContextProvider.kt	94.12% <100.00%> (+1.81%)	⬆️
...id/sessionreplay/internal/processor/BoundsUtils.kt	70.83% <100.00%> (+2.65%)	⬆️
...onreplay/internal/processor/HeatmapWireframeExt.kt	100.00% <100.00%> (ø)
...ssionreplay/internal/processor/MobileSegmentExt.kt	100.00% <100.00%> (ø)
...replay/internal/processor/RecordedDataProcessor.kt	96.25% <100.00%> (-1.48%)	⬇️
...sionreplay/internal/processor/ResourceProcessor.kt	100.00% <100.00%> (ø)
...nreplay/internal/recorder/SessionReplayRecorder.kt	94.55% <100.00%> (+3.76%)	⬆️
...nreplay/internal/recorder/ViewOnDrawInterceptor.kt	88.89% <100.00%> (+0.65%)	⬆️
... and 16 more

... and 111 files with indirect coverage changes

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve the existing record constructors

Adding this optional generated property changes MobileFullSnapshotRecord from the JVM constructor (Long, Data) to (Long, Data, String?); the analogous change in incremental-snapshot-record-schema.json also removes the existing two-argument MobileIncrementalSnapshotRecord constructor. Kotlin default arguments do not retain those old JVM signatures, so an already-compiled library that constructs either public model will fail with NoSuchMethodError when resolved against this SDK version. Keep binary-compatible two-argument overloads or secondary constructors while adding slotId.

Useful? React with 👍 / 👎.

[jonathanmos]

We don’t guarantee binary compatibility for the generated Session Replay models, including record and wireframe types. Therefore, preserving the previous JVM constructors is not required for this change.

[chatgpt-codex-connector]

Respect transparent embedded host views

When an embedded host has partial or zero alpha, or a translucent background, the mapper carries that opacity in its shape style but this branch still treats the wireframe as fully opaque solely because it is visible. NodeFlattener consequently removes any fully covered native wireframes underneath, so transparent portions of the embedded renderer cannot be reconstructed in the replay. Determine coverage from the host opacity/shape style, or conservatively treat the embedded wireframe as non-opaque when opacity is unknown.

Useful? React with 👍 / 👎.

[jonathanmos]

Transparent Flutter hosts appear to be a valid use case, but I don’t want to block this PR. I’ll open a follow-up to address this separately.

[chatgpt-codex-connector]

Mark embedded resources only after persistence succeeds

For the new embedded-resource path, this marks and persists the identifier as sent before SessionReplayResourcesWriter attempts to store the bytes. That writer ignores the Boolean result of EventBatchWriter.write and can also no-op if its feature disappears, so if the first write is rejected during a transient storage failure or shutdown race, every later submission with the same identifier is suppressed and replay wireframes permanently reference a missing resource. Mark the identifier only after a successful storage write, or remove it again when persistence fails.

Useful? React with 👍 / 👎.

[jonathanmos]

This matches the existing native Session Replay resource flow, which also marks resources before writing them. Fixing it would require changing the async writer contract, so I’d handle this in a separate pr