feat: Error Handling and Transfer Status assignment FAILED_TO_START

[sydney-munro]

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Fixes #<issue_number_goes_here> ☕️

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[BenWhitehead]

One small nit. Merge away after fix.

[gcf-merge-on-green]

Your PR doesn't have any required checks. Please add required checks to your feat/transfer-manager branch and then re-add the label. Learn more about enabling these checks here: https://help.github.com/en/github/administering-a-repository/enabling-required-status-checks.

[gcf-merge-on-green]

Your PR doesn't have any required checks. Please add required checks to your feat/transfer-manager branch and then re-add the label. Learn more about enabling these checks here: https://help.github.com/en/github/administering-a-repository/enabling-required-status-checks.

[gcf-merge-on-green]

Your PR doesn't have any required checks. Please add required checks to your feat/transfer-manager branch and then re-add the label. Learn more about enabling these checks here: https://help.github.com/en/github/administering-a-repository/enabling-required-status-checks.