Use postgres for CI run_unit_tests

[QuanMPhm]

Closes #254.

A Postgres-specific bug was found regarding creating Field Of Science entries. More details in tests/unit/test_migrate_field_of_science.py.

[knikolla]

Does this still allow to optionally run the tests with SQLite? Running tests with Postgres should be an additional thing rather than completely removing SQLite.

[QuanMPhm]

@knikolla I've made the one test case in src/coldfront_plugin_cloud/tests/unit/test_migrate_field_of_science.py check if DB_URL is set, in which case it will run the postgres specific SQL commands. Otherwise, all the other tests can still be ran with SQLite, you just need to not set DB_URL

[knikolla]

Before the introduction of this change, you could run setup.sh followed by run_unit_tests.sh in your local machine without having to setup anything externally and they would work on both Mac and Linux. These changes break that.

Please preserve original behavior in the original functioning of the scripts.

For example, maybe add the postgresql user and db configuration and DB_URL variable export within the GitHub action workflow, rather than the script file itself. This way the CI in GitHub will use postgres whereas when a user is testing in their local machine and running the file they will still work as before.

[Copilot]

Pull request overview

This pull request migrates the CI testing infrastructure from MySQL to PostgreSQL to better match the production environment. The change addresses a specific bug where Postgres enforces character limits on database fields that MySQL doesn't, which was discovered when trying to add new allocation attributes.

Changes:

• Adds Postgres support to CI workflows by setting the DB_URL environment variable
• Installs and configures PostgreSQL service in the CI setup script
• Fixes a Postgres-specific sequence synchronization issue for FieldOfScience model tests
• Consolidates CI setup across workflows to use a common setup.sh script

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test-requirements.txt	Adds psycopg2 package for PostgreSQL database connectivity
src/coldfront_plugin_cloud/tests/unit/test_migrate_field_of_science.py	Adds setUp method to reset Postgres sequence for FieldOfScience IDs to prevent insertion conflicts
ci/setup.sh	Starts PostgreSQL service and sets password when running in CI environment
.github/workflows/test-unit.yaml	Adds DB_URL environment variable pointing to Postgres, updates step name
.github/workflows/test-functional-microstack.yaml	Adds DB_URL environment variable, consolidates setup to use setup.sh script, updates step name
.github/workflows/test-functional-microshift.yaml	Adds DB_URL environment variable for consistency with other workflows

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