ION service boostrap

[JoTurk]

This tracks the initial stage of ION remake.

• Define Configuration Schema & Defaults #2
• Structure logging and the capture of Pion errors. #3
• Prometheus and opentelemetry for metrics and tracing #4
• Secrets Storage, Handling and Redaction #5
• Repo Lint and CI #6
• Composition Root in main() and wiring. #7