Self-hosted auto-updates from Gitea via PUC + proprietary licence

Vendors YahnisElsts/plugin-update-checker v5.7 under vendor/ and wires
it to poll updates.json on the repo main branch. WP surfaces new
versions via Dashboard → Updates on its normal twice-daily cadence.

PUC is vendored (not a submodule) so Gitea's archive/main.zip — the
download target — includes it.

Also relicenses from GPL-2.0-or-later to a proprietary licence granting
use only to authorised sites, with all other rights reserved. Plugin
URI + Author URI switched from the placeholder github.com URL to the
canonical Gitea repo.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

readme.txt

@@ -5,8 +5,8 @@ Requires at least: 6.0
 Tested up to: 6.8
 Stable tag: 1.0.0
 Requires PHP: 7.4
-License: GPLv2 or later
-License URI: https://www.gnu.org/licenses/gpl-2.0.html
+License: Proprietary
+License URI: https://git.h12e.com/steve/att-consent/raw/branch/main/LICENSE
 
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