chore(ci): move docker testing to just

[CommanderStorm]

this PR pulls the resonably problemnatic move from CI-bash to just-bash from

• feat: migrate our log library to tracing #2494

[Copilot]

Pull request overview

This PR refactors Docker integration testing by moving the test configuration from inline bash scripts in the CI workflow to reusable just recipes. The change improves maintainability by centralizing Docker test logic in the justfile rather than duplicating it across CI workflow steps.

Changes:

• Created two new just recipes (run-in-docker-image and test-int-in-docker-image) to encapsulate Docker test execution
• Simplified CI workflow by replacing repetitive inline bash blocks with concise just command invocations
• Enhanced test-lambda recipe with GitHub Actions grouping for better CI output organization

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
justfile	Added run-in-docker-image helper recipe to run binaries in Docker containers, added test-int-in-docker-image recipe to orchestrate integration tests against Docker images, improved test-lambda with output grouping, and fixed comment formatting
.github/workflows/ci.yml	Replaced verbose inline Docker test commands with clean just recipe calls, and added installation of just and cargo-sqlx tools required for the new approach