Back up every store: the restic module holds node-backup, the stores contribute their dumps

ADR 0214 / to-be 43. restic keeps one repository per machine and takes a nightly snapshot per
module — 14 daily, 8 weekly, 6 monthly — and restores beside the live data, never over it. postgres,
mssql and mongodb contribute a consistent dump; minio, influxdb, the vault, mailu, gitea and
nextcloud the directories that hold their data.

modules/restic/module.json

@@ -0,0 +1,64 @@
+{
+  "module": "restic",
+  "version": "1",
+  "claims": [
+    {
+      "name": "node-backup",
+      "scope": "node",
+      "serves": [
+        "backed-up",
+        "now",
+        "restore"
+      ]
+    }
+  ],
+  "own-secrets": {
+    "repository": "${dir:state}/repository.secret"
+  },
+  "resources": [
+    {
+      "id": "state",
+      "type": "directory",
+      "mode": "0700",
+      "place": "."
+    },
+    {
+      "id": "repository",
+      "type": "directory",
+      "mode": "0700"
+    },
+    {
+      "id": "declared",
+      "type": "file",
+      "path": "${dir:state}/backups.conf",
+      "mode": "0600",
+      "content": "# What the modules on this machine back up, composed by the mesh (novox/hq to-be 43). Do not edit.\n${contribution:node-backup:backup}"
+    },
+    {
+      "id": "tool",
+      "type": "package",
+      "package": "restic"
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "typescript",
+        "entrypoints": [
+          "tools/index.js"
+        ],
+        "loads": [
+          "tools/index.js"
+        ],
+        "env": {
+          "MESH_BACKUP_DECLARED": "${dir:state}/backups.conf",
+          "MESH_BACKUP_REPOSITORY": "${dir:repository}",
+          "MESH_BACKUP_PASSWORD_FILE": "${dir:state}/repository.secret",
+          "MESH_BACKUP_STATE": "${dir:state}"
+        }
+      }
+    ]
+  }
+}