chore(oss): audit the console package and the Helm chart

Add the dist/migrate.js entrypoint the Helm job already invoked and point
Compose at the same runner, so one implementation applies
packages/server/migrations in both paths. Rewrite the console README to
the standalone Docker build it actually uses and fix the chart
description.

Claude-Session: https://claude.ai/code/session_01Agoc9bRVE9KL7mmWtey9Vq

helm/elydora/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: elydora
-description: Elydora — Open-source AI accountability and compliance platform
+description: Open-source AI accountability and compliance platform for Elydora
 type: application
 version: 0.1.0
 appVersion: "0.1.0"