Bugfix: avoid querying device after depthNode pipeline stops

[MaticTonin]

Summary
Fixes a segfault in the Depth AUTO backend on-device tests on RVC2/network devices.
The test previously queried getConnectedCameraFeatures() after startPipelineAndRequireFirstFrames() returned. That helper stops the pipeline before returning, which closes the device RPC client. The subsequent capability query dereferenced the closed client and caused a SIGSEGV.
Capture the platform and ToF capability while the device is live, then use those cached values for post-stop backend assertions.

Tested with:

cmake --build build --target depth_node_test -j 4
DEPTHAI_PLATFORM=rvc2 ./build/tests/depth_node_test \
  'Depth: AUTO selects backend by platform and sensors' --reporter compact

https://github.com/luxonis/depthai-core/actions/runs/32837049490/job/97770930315#step:3:4404

Summary by CodeRabbit

• Tests
  • Improved validation of automatic depth-camera backend selection across standard, user-camera, and camera-reuse scenarios.
  • Test checks now use the active platform and precomputed time-of-flight selection state for more consistent results.
  • Expanded coverage helps ensure reliable depth processing across supported camera configurations and device platforms.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Run ID: b203232e-9d37-4041-bc3b-31421f964289

📥 Commits

Reviewing files that changed from the base of the PR and between 9837c7d and b563988.

📒 Files selected for processing (1)

• tests/src/ondevice_tests/pipeline/node/depth_node_test.cpp

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📜 Recent review details

🔇 Additional comments (1)

tests/src/ondevice_tests/pipeline/node/depth_node_test.cpp (1)

140-163: LGTM!

Also applies to: 379-380, 414-414, 444-452, 510-512, 546-546, 559-559, 639-639, 652-652

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📝 Walkthrough

Walkthrough

Depth AUTO backend tests now receive the platform and precomputed RVC2 ToF-sensor state. User-camera, AUTO-selection, rebuild, and camera-reuse test paths pass these values to backend validation.

Changes

Depth AUTO validation

Layer / File(s)	Summary
Update AUTO backend validation contract tests/src/ondevice_tests/pipeline/node/depth_node_test.cpp	requireDepthAutoBackend now accepts explicit platform and ToF-sensor inputs.
Pass precomputed selection state tests/src/ondevice_tests/pipeline/node/depth_node_test.cpp	User-camera, AUTO-selection, rebuild, and camera-reuse tests compute and pass platform and ToF-sensor state.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to b5639

The test now captures device capabilities while the device is live, avoiding the post-stop query that caused the crash; no actionable merge-blocking risk remains after normal checks and review.

Suggested reviewers: cenekalbl, viacheslavtelelyukhin

Poem

A rabbit checks the depth path bright
AUTO hops with state in sight
ToF choices arrive prepared
Each camera test is now compared
Ears up, the backend matches right

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: it prevents device queries after the depthNode pipeline stops. It is concise and specific.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

• Fix all pre-merge checks with AI

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bugfix/depthNode-autostop

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[JakubFara]

Why we require RVC2 platform? You check the platform later.
I suggest rename it to hasTofSensor and just place there deviceReportsTofSensor(device).

[MaticTonin]

Renamed and remived the RVC2 platform check yea, since its duplicated