docs(cloudxr): document the client timeout env vars and test that 0 passes through

[gareth-morgan-nv]

Summary

Stacked on #1257 (base is that PR's branch, so the diff here is only this commit).

TELEOP_CLIENT_STREAM_ATTACH_TIMEOUT_MS, TELEOP_CLIENT_WARMUP_BEGIN_TIMEOUT_MS and TELEOP_CLIENT_WARMUP_END_TIMEOUT_MS already reach the headset URL, but were missing from the OOB env var table.

• Docs: add the three variables to oob_teleop_control.rst, including that 0 disables detection. TELEOP_CLIENT_WARMUP_END_TIMEOUT_MS=0 turns off all warm-up detection, which is what you want when the OpenXR application starts after the headset connects: until it submits frames the server sends only idle frames, which the client cannot tell apart from a stuck warm-up.
• Test: test_zero_warmup_timeout_env_reaches_bookmark_url checks that a 0 value survives env parsing and URL building, so it is not dropped as falsy.

No behavior change in Python; the env-var plumbing is already on main.

Test plan

• Relevant tests in test_oob_teleop_env.py / test_oob_teleop_adb.py pass (5 selected)
• SKIP=check-copyright-year pre-commit run --all-files passes
• The web client only treats 0 as "disabled" once fix(webxr): let 0 disable the stream-attach and warm-up timeouts #1257 is in; until then use a large value such as 2147483647

🤖 Generated with Claude Code

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

• Configuration used: Repository: NVIDIA/IsaacCapture/.coderabbit.yaml
• Review profile: CHILL
• Plan: Enterprise
• Run ID: f98801a0-992e-4088-acf2-502c756140b5

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

_{Comment @coderabbitai help to get the list of available commands.}