add extended metadata schema

[BobanL]

PULL REQUEST

Summary

• Create new extended_metadata_db.sql file
• Written for SQL Server
  • UUID type is supported in Postgres and SQL Server, but not MySQL or Oracle.
  • DATETIME is supported in SQL Server and MySQL but not in Oracle or postgres.
  • UUID would be pretty easy and seamless to change to varchar, but if we convert DATETIME to varchar we would probably lose out a lot.

Related Issue

Fixes #2349

Additional Information

• Acceptance calls out to be stored in src/app, but I believe it makes more sense to store the schema outside of the src folder to keep it totally separate from the typescript folder structure we have now
• An additional table was created to handle ecr_rr_conditions.rule_summary since it is an array of data and SQL server does not support array types.

Checklist