Analyzer should periodically checkpoint progress when processing large log files

[jlewi]

• We want to incrementally checkpoint log processing when processing really long files.
• Otherwise when processing really long files we could potentially run into problems with not making progress.
• As part of this processing loop we need to periodically check if the application has been shutdown and if so stop processing log entries.

[netlify[bot]]

✅ Deploy Preview for foyle canceled.

Name	Link
🔨 Latest commit	c9e17a5acf9045add3d23926ef5c1e65c6c44b86
🔍 Latest deploy log	https://app.netlify.com/sites/foyle/deploys/66e09b370bb0f80008743608