Aggregate compile time trace in build job

[amgebauer]

Directly aggregate the compile time trace in the build job and clean all other time-trace json files to avoid running out of storage.

Closes #1361

Let's see whether this works: https://github.com/amgebauer/4C/actions/runs/18407082001/job/52449454062

[amgebauer]

At least the build job works again, but I have messed up the artifacts name. Next try: https://github.com/amgebauer/4C/actions/runs/18410019861/job/52459560774

[Copilot]

Pull Request Overview

This PR optimizes the compile time tracing workflow by aggregating ninja tracing output directly in the build job to prevent storage issues from individual trace files. The main goal is to consolidate tracing data earlier in the pipeline and clean up individual files to avoid running out of storage space.

Key changes:

• Created a reusable action to aggregate ninja tracing output with optional cleanup
• Moved trace aggregation from the analyze job to the build job
• Simplified the analyze job by removing duplicate tracing logic

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
.github/workflows/nightly_tests.yml	Integrated ninja tracing aggregation into build job and streamlined analyze job
.github/actions/aggregate_ninja_tracing/action.yml	New reusable action for aggregating ninja traces with cleanup option

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[amgebauer]

Unfortunately, this does not (yet) work as hoped. ClangBuildAnalyzer does not find the aggregated json file as hoped. @sebproell For what reason do we need the ClangBuildAnalyzer? Is it just the txt-output?

We could maybe replace it with just generating the html-report.

[sebproell]

ClangBuildAnalyzer aggregates the results and gives a very concise overview about the build performance. I use its "expensive header" info quite often.

[amgebauer]

I now moved the whole compile time analysis to the clang build job (in an extra action). Now, the clang18 job works again: https://github.com/amgebauer/4C/actions/runs/18459444810

In a later step, we can use the artifacts and generate an html report with catapult to make the report more usable.

Please review

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

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