Sync Shared Documentation workflow fails on commit messages with single quotes

[mottych]

Summary

The Sync Shared Documentation workflow can fail in its summary step when the commit message contains single quotes.

Observed behavior

After merging issue #332, the application deployment workflows passed, but Sync Shared Documentation failed in job sync-docs, step Summary with a shell parsing error caused by the merge commit message.

Example triggering message:
Merge branch 'feature/issue-332-scoped-coaching-sessions' into dev

Observed error:
unexpected EOF while looking for matching '''

Expected behavior

The workflow should safely render commit metadata in $GITHUB_STEP_SUMMARY regardless of quotes or other shell-sensitive characters in the commit message.

Likely cause

.github/workflows/sync-shared-docs.yml currently interpolates the commit message into a shell echo command without safe escaping.

Suggested direction

Update the summary step to handle commit messages safely, for example by avoiding raw shell interpolation or by writing the value through a quoting-safe mechanism.

[mottych]

Implementation plan approved and in progress.\n\nCurrent understanding / acceptance criteria:\n- Sync Shared Documentation must not fail when the source commit message contains single quotes or other shell-sensitive characters.\n- The workflow should still write a readable summary entry to $GITHUB_STEP_SUMMARY.\n- The fix should be narrowly scoped to the workflow and should not change the actual docs sync behavior.\n\nPlanned approach:\n- Update .github/workflows/sync-shared-docs.yml so the summary step handles the commit message through a quoting-safe path instead of embedding it inside a shell-quoted command substitution.\n- Keep the existing commit metadata output and summary content intact as much as possible.\n- Run repo validation after the change and verify the workflow file is syntactically sound through the existing quality gates.\n\nValidation plan:\n- Run focused local verification against the workflow shell logic.\n- Run full scripts/pre-commit-check.ps1.\n- Merge to dev, push, and watch GitHub Actions to confirm the docs sync workflow no longer fails on the summary step.

[mottych]

Implemented and deployed the workflow fix.\n\nWhat changed:\n- Updated .github/workflows/sync-shared-docs.yml so the summary step reads the commit message through an environment variable instead of embedding it inside a shell-quoted command substitution.\n- The summary now writes the message with printf, which safely handles single quotes in commit subjects.\n\nValidation completed:\n- Full scripts/pre-commit-check.ps1 passed.\n- Merged to dev and pushed successfully.\n- Manually dispatched Sync Shared Documentation on dev to validate the exact workflow path.\n- The workflow completed successfully and the Summary step passed.\n\nNote:\n- The manual workflow run showed a non-blocking GitHub Actions warning that �ctions/checkout@v4 still relies on deprecated Node.js 20 and should be updated ahead of GitHub's Node 24 cutoff.