add hs GPA bands

[anthonygwalters]

Pull Request

Summary & Motivation

Self-review

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• Update due date, assignee, and priority on our
  TEAMster Asana Project
• Format has been run on all modified files

SQL

• Ensure you are using the union_dataset_join_clause() macro for queries that employ any
  models using these datasets: deanslist edplan iready overgrad pearson powerschool
renlearn titan

• All distinct usage must be accompanied by an comment explaining it's necessity

• If you are adding a new external source, run:

  dbt run-operation stage_external_sources --vars
  "ext_full_refresh: true"
  

Troubleshooting

• SqlFluff Rules Reference
• Trunk
• dbt

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