Hotfix: Default to Birth Sex

[jayckaiser]

Hotfix: Default to Birth Sex

Description & motivation

By default, if studentEducationOrganizationAssociations.genderIdentity is not populated, no gender information makes it through to dim_student. In some Stadium implementations (like SCDE), genderIdentity is not accessible, but birthSex is.

This PR proposes defaulting to birthSex value if the genderIdentity field is empty.

PR Merge Priority:

• Low
• Medium
• High

Changes to existing files:

• bld_ef3__immutable_stu_demos.sql: Use a coalesce to prefer gender identity, then birth sex.

Tests and QC done:

This code has not been run in SCDE yet. I'd like to discuss whether this should be a default or a config option.

edu_wh PR Review Checklist:

Make sure the following have been completed before approving this PR:

• Description of changes has been added to Unreleased section of CHANGELOG.md. Add under ## New Features for features, etc.
• If a new configuration xwalk was added:
  • The code is written such that the xwalk is optional (preferred), and this behavior was tested, OR
  • The code is written such that the xwalk is required, and the required xwalk is added to edu_project_template, and this PR is flagged as breaking change (not for patch release)
  • A description for the new xwalk has been added to EDU documentation site here
• If a new configuration variable was added:
  • The code is written such that the variable is optional (preferred), and this behavior was tested, OR
  • The code is written such that the variable is required, and a default value was added to edu_project_template, and this PR is flagged as breaking change (not for patch release)
  • A description for the new variable has been added to EDU documentation site here
• Reviewer confirms the grain of all tables are unchanged, OR any changes are expected, communicated, and this PR is flagged as a breaking change (not for patch release)