Regression analysis - 5.4 (fixed 5.5.2) CiviCase bug on new installs

**What happened ** An enhancement was made to CiviCase that required a new option value. The option value was added in the upgrade script but was missed for new installs.

How & When was it addressed It was identified in stack exchange but as it only affected new installs it was not immediately understood as an issue. It was fixed quickly once confirmed as an issue.

How did the regression fit with our processes? The PR had been reviewed but this was missed

Recommendations going forwards I think in this case we need to learn from the specific nature of the issue.