ci: wire shared composite actions

[JunyangHe]

Description

Wire composite actions into a few workflows

Testing

How have you tested the change?

• I ran npm run test:unit and npm run test:integ
• I ran npm run typecheck
• I ran npm run lint
• If I modified src/assets/, I ran npm run test:update-snapshots and committed the updated snapshots

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the
terms of your choice.

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	40.4%	15089 / 37343
🔵	Statements	39.66%	16084 / 40546
🔵	Functions	34.51%	2575 / 7461
🔵	Branches	33.8%	10054 / 29742

Generated in workflow #4247 for commit e3ee901 by the Vitest Coverage Report Action

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)