feat: DI extension, services.yaml, and autoloader fix for plugin detection

- Add DependencyInjection/KimaiHeatmapExtension to load services.yaml
- Register bundle as tagged PluginInterface service so PluginManager finds it
- Exclude recursive symlink path from Kimai's autoloader classmap
- Bump PHP memory_limit to 1G for Kimai cache warmup

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

DependencyInjection/KimaiHeatmapExtension.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace KimaiPlugin\KimaiHeatmapBundle\DependencyInjection;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+class KimaiHeatmapExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container): void
+    {
+        $loader = new YamlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
+        $loader->load('services.yaml');
+    }
+}

Resources/config/services.yaml

@@ -0,0 +1,3 @@
+services:
+    KimaiPlugin\KimaiHeatmapBundle\KimaiHeatmapBundle:
+        tags: ['App\Plugin\PluginInterface']

dev/setup.sh

@@ -61,7 +61,22 @@ echo "==> Symlinking plugin..."
 mkdir -p var/plugins
 ln -sfn "$PROJECT_DIR" var/plugins/KimaiHeatmapBundle
 
-# Step 9: Clear cache
+# Step 9: Exclude recursive symlink from autoloader classmap
+# The plugin symlink points to project root which contains dev/kimai/ creating a loop.
+# Tell Composer to skip scanning the dev/ directory inside the plugin symlink.
+cd "$KIMAI_DIR"
+php -r '
+$f = "composer.json";
+$j = json_decode(file_get_contents($f), true);
+$exclude = "var/plugins/KimaiHeatmapBundle/dev/";
+if (!in_array($exclude, $j["autoload"]["exclude-from-classmap"] ?? [])) {
+    $j["autoload"]["exclude-from-classmap"][] = $exclude;
+    file_put_contents($f, json_encode($j, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . "\n");
+}
+'
+composer dump-autoload
+
+# Step 10: Clear cache
 bin/console cache:clear
 
 # Stop MariaDB

flake.nix

@@ -11,7 +11,7 @@
       pkgs = nixpkgs.legacyPackages.${system};
       php = pkgs.php82.buildEnv {
         extensions = { enabled, all }: enabled ++ (with all; [ xsl pdo_mysql ]);
-        extraConfig = "memory_limit = 512M";
+        extraConfig = "memory_limit = 1G";
       };
     in
     {