fix: add MediaWiki environment variables to docker-compose

Error: 500 Internal Server Error on MediaWiki import
Root cause: MEDIAWIKI_API_URL not configured in container

Fix:
- Added MEDIAWIKI_API_URL: https://karatetrainer.net/api.php
- Added MEDIAWIKI_USER, MEDIAWIKI_PASSWORD (optional, uses .env)
- Added category name overrides (4 categories)

Public wiki access (read-only) does not require authentication.
User/password only needed for write operations.

Note: .env file created locally but not committed (in .gitignore)
Users should copy .env.example and set their credentials if needed.

docker-compose.dev-env.yml

@@ -37,6 +37,13 @@ services:
       APP_URL: http://192.168.2.49:3098
       ALLOWED_ORIGINS: http://192.168.2.49:3098
       ENVIRONMENT: development
+      MEDIAWIKI_API_URL: https://karatetrainer.net/api.php
+      MEDIAWIKI_USER: ${MEDIAWIKI_USER:-}
+      MEDIAWIKI_PASSWORD: ${MEDIAWIKI_PASSWORD:-}
+      MEDIAWIKI_CATEGORY_EXERCISES: Übungen
+      MEDIAWIKI_CATEGORY_SKILLS: Fähigkeitsbeschreibung
+      MEDIAWIKI_CATEGORY_METHODS: Methodenbeschreibung
+      MEDIAWIKI_CATEGORY_MODELS: Reifegradmodelle
     volumes:
       - dev-shinkan-media:/app/media
     ports: