Let a super admin read the database from the app

A new super admin settings page, /admin/settings/database, lists every
table with its record count and size, and one page of the open table's
records newest key first. Values are cut inside SQL (400 characters, with
a flag saying so) and a record opens whole in a modal, so a table of long
texts reads without shipping it all. A search matches every column's
text, word by word or as a phrase, which is the one thing that also works
on a virtual table. Nothing in it writes: the catalog, the records and
the single record are all reads, GET only.

src/data/app-data.ts

@@ -451,6 +451,20 @@ export const AppData = {
      */
     StorageBrowserPageSize: 200,
     StorageBrowserReadMaxBytes: 50 * 1024 * 1024,
+    /**
+     * The database browser at `/admin/settings/database`: how many records
+     * of a table one page shows, how much of a value a cell carries before
+     * the rest waits behind its record's modal, and the most of one value
+     * that modal shows (a whole media row or job checkpoint is not meant
+     * to be rendered).
+     */
+    DatabaseBrowserPageSize: 50,
+    DatabaseBrowserCellMaxChars: 400,
+    DatabaseBrowserValueMaxChars: 20000,
+    /**
+     * The most words one search matches in the database browser.
+     */
+    DatabaseBrowserMaxSearchWords: 8,
     /**
      * The most a bot copies off a computer into its own files in one
      * call, so a folder of raw evidence can't fill the data volume.