fix(techdocs): publish only changed components on push

[flaxel]

Summary

The monorepo TechDocs template republished every component on every push, generating and uploading docs sequentially (~13s each). As the number of components grew, the job stopped finishing in time and was reclaimed mid-run, surfacing as cancelled runs.

This change computes the push diff (github.event.before..sha) and only (re)publishes components whose directory changed. It falls back to a full publish when:

• the diff cannot be determined (non-push events, missing/zero base commit, unfetchable base), or
• a global file changes (the workflow itself or the repo-root mkdocs.yml).

It also switches this workflow to the normal Ubuntu runner (ubuntu-24.04) instead of ubuntu-slim.

Changes

• .github/workflows/template_techdocs_monorepo.yml: add incremental publish logic to the "Generate and Publish TechDocs" step.
• .github/workflows/template_techdocs_monorepo.yml: change runs-on from ubuntu-slim to ubuntu-24.04.

🤖 Generated with Claude Code

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[flaxel]

@copilot Use the normal ubuntu runner for this action.

[Copilot]

@copilot Use the normal ubuntu runner for this action.

Updated in commit 02fc71e: the TechDocs monorepo workflow now uses the normal Ubuntu runner (ubuntu-24.04) instead of ubuntu-slim.

[axdotl]

@flaxel Think a partial build is reasonable, but would also like to understand where the "the job stopped finishing in time" comes from. Where and how a time constraint/ timeout comes from?

[flaxel]

@axdotl The time constraint is a hard configuration in the ubuntu slim image.