chore: stage all in-progress work before repo split

Web app: new entities (Image, RenderedAsset, SharedImage, Token,
DeviceImageHistory), enums, repositories, controllers, message handlers,
migrations, tests, frontend upload/library/sticker UI, Vue components.

Firmware: EPD background screen binaries + gen scripts, setup_bg header.

Infra: ddev config, test bundle, gitignore coverage dir.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

phpunit.dist.xml

@@ -32,6 +32,10 @@
             <directory>src</directory>
         </include>
 
+        <exclude>
+            <directory>src/DataFixtures</directory>
+        </exclude>
+
         <deprecationTrigger>
             <method>Doctrine\Deprecations\Deprecation::trigger</method>
             <method>Doctrine\Deprecations\Deprecation::delegateTriggerToBackend</method>
@@ -40,5 +44,6 @@
     </source>
 
     <extensions>
+        <bootstrap class="DAMA\DoctrineTestBundle\PHPUnit\PHPUnitExtension"/>
     </extensions>
 </phpunit>