Add Linux deployment installer, supervised services and readiness checks

README.md

@@ -17,6 +17,8 @@ The [continuous analysis worker](docs/analysis-worker.md) consumes that inbox,
 routes cases to configured projects and resumes checkpointed analysis after restart.
 The [web console](docs/web-console.md) shows active workers, case progress and token
 charts, with corrections accounted for separately, and accepts new/return submissions.
+The [Linux deployment guide](docs/linux-deployment.md) covers systemd services,
+protected credentials, HTTPS and non-billable readiness checks.
 
 Requires Python 3.11 or newer.