CI: Avoid manual lookup of the run ID in the release workflow

[Copilot]

This PR fixes an issue in the release workflow where the optional run-id input parameter was missing a default value, which could cause issues when the parameter is not provided.

The changes include:

• Added default: "" to the optional run-id input parameter
• Implemented automatic run ID lookup from git tag when run-id is not provided
• Added comprehensive error handling and validation to the lookup script
• Added documentation comment explaining the fetch-depth: 0 requirement for git tag access

The workflow now gracefully handles both scenarios:

1. When run-id is provided manually (existing behavior preserved)
2. When run-id is omitted, it automatically detects the correct run ID from the provided git tag

This eliminates the need for manual lookup of run IDs while maintaining full backward compatibility.

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[leofang]

One last sweep and we're done! I confirmed that the lookup-run-id script works locally.

[leofang]

@copilot

[leofang]

pre-commit.ci autofix

[leofang]

This is ready for review. No need to run it through the CI, because the release workflow would not be exercised until the release time.

[rwgk]

This is awesome.

I usually weed out the 2>/dev/null code that ChatGPT seems to insert compulsively. It'd be ideal if you did that here, too. (Then admin merging would seem best.)

[cryos]

I would summarize the output to standard error as a way of offering debug and errors without polluting what is captured by the caller (the run ID). Seems reasonable and I see the logic. It works too and is something I wrote locally just the other day for another task and was about to look at here - you and copilot beat me again :-)

[leofang]

Thanks @cryos @rwgk for review 🙏 let's see if this works out of box next time we cut a release...

[github-actions]

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[leofang]

let's see if this works out of box next time we cut a release...

@rwgk confirmed with cuda-pathinder v1.2.2 release that the auto lookup works:
https://github.com/NVIDIA/cuda-python/actions/runs/17567646227