admin/settings: maintenance page, show database size

crates/database/queries/settings/database_size.sql

@@ -0,0 +1,2 @@
+select page_count * page_size
+FROM pragma_page_count(), pragma_page_size();

crates/database/sqlx-data.json

@@ -1598,6 +1598,24 @@
     },
     "query": "select id,\n       created_at      as \"created_at: DateTime<Utc>\",\n       updated_at      as \"updated_at: DateTime<Utc>\",\n       label,\n       redirect_uri,\n       secret,\n       is_confidential as \"is_confidential: bool\",\n       is_archived     as \"is_archived: bool\"\nfrom apps\n\nwhere id is (?)\n"
   },
+  "e977ca16c7bd7ec4125725ff5e42d3c547634e2b608d6be91814bce657e07b65": {
+    "describe": {
+      "columns": [
+        {
+          "name": "page_count * page_size",
+          "ordinal": 0,
+          "type_info": "Int"
+        }
+      ],
+      "nullable": [
+        null
+      ],
+      "parameters": {
+        "Right": 0
+      }
+    },
+    "query": "select page_count * page_size\nFROM pragma_page_count(), pragma_page_size();"
+  },
   "eaf0744f65a1de803fa8cc21b67bad4bdf22760d431265cf97b911e6456b2fd8": {
     "describe": {
       "columns": [

crates/database/src/tables/settings.rs

@@ -31,6 +31,13 @@ impl Settings {
             .map_err(handle_error)
     }
 
+    pub async fn database_size(conn: impl SqliteExecutor<'_>) -> Result<Option<i32>, Error> {
+        sqlx::query_file_scalar!("queries/settings/database_size.sql")
+            .fetch_one(conn)
+            .await
+            .map_err(handle_error)
+    }
+
     pub async fn set_business_name(
         conn: impl SqliteExecutor<'_>,
         value: Option<&str>,