Convert Alpine ingestion to worker handler

Convert the Alpine ingestion component into a worker handler.

This component is a worker handler. See the worker design for additional information.

Diagrams

sequenceDiagram

    participant s as Scheduler
    participant w as Worker
    participant tr as Alpine Ingest Handler
    participant db as SQL
    participant ps as PubSub

    s ->> ps: Trigger Alpine Ingestion

    ps ->> w: Poll for Message
    w ->> tr: Run