Add missing store bridge packages to require-dev

The options.php configuration imports Distance enums from
symfony/ai-postgres-store and symfony/ai-redis-store, but these
packages were split out and not added to require-dev.

Fixes #1075

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Author: OskarStark

src/ai-bundle/composer.json

@@ -38,6 +38,8 @@
         "symfony/ai-chroma-db-store": "@dev",
         "symfony/ai-mongo-db-store": "@dev",
         "symfony/ai-pinecone-store": "@dev",
+        "symfony/ai-postgres-store": "@dev",
+        "symfony/ai-redis-store": "@dev",
         "symfony/expression-language": "^7.3|^8.0",
         "symfony/security-core": "^7.3|^8.0",
         "symfony/translation": "^7.3|^8.0"