Adds a manually-triggered workflow that copies secrets from
unity-builder (repo + org level) to target repos like orchestrator
and cli. Uses GIT_PRIVATE_TOKEN for cross-repo API access.
Secrets synced: UNITY_EMAIL, UNITY_PASSWORD, UNITY_SERIAL,
GIT_PRIVATE_TOKEN, LOCALSTACK_AUTH_TOKEN, GOOGLE_SERVICE_ACCOUNT_EMAIL,
GOOGLE_SERVICE_ACCOUNT_KEY, CODECOV_TOKEN.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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