Add OneLab Helm chart, Argo CD Application, and GitOps values for k3s

Made-with: Cursor

app/playbooks/tasks/post-db-migration.yml

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+---
+
+- name: Pull new postgres image
+  shell: |
+    docker image pull hub.andrewalliance.com/releases/postgres:17.8
+  become: true
+  when: (docker_images_tar is undefined) or (not docker_images_tar.stat.exists)
+
+- name: Cleaning database
+  shell: >
+    docker volume rm onelab_pgdata
+  become: true
+
+- include_tasks: "{{ onelab_path }}/installation/latest/app/playbooks/tasks/start-db-only.yml"
+
+- name: Restoring & Migrating database
+  shell: |
+    docker exec -i $(docker ps --filter "name=onelab_db|onelab-db" -q) pg_restore -Upostgres -dpostgres -v -Fc  < {{ onelab_path }}/db-migration-postgres.tar.gz
+    rm {{ onelab_path }}/db-migration-postgres.tar.gz
+  become: true
+
+- include_tasks: "{{ onelab_path }}/installation/latest/app/playbooks/tasks/stop-db-only.yml"
+
+- name: Removing lock file
+  shell: >
+    rm {{ onelab_path }}/.lock_db_migration
+  become: true
+