chore: release as 0.0.6; compare the version check against published releases

- composer.json 0.0.6, CHANGELOG entries of the withdrawn 0.1.0/0.1.1 merged into [0.0.6]
- version-changelog: version must exceed the latest published release (main may carry a
  version whose release was withdrawn), instead of exceeding main's version

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

composer.json

@@ -3,7 +3,7 @@
     "description": "Export database dumps for Shopware 6 environments.",
     "type": "shopware-platform-plugin",
     "license": "MIT",
-    "version": "0.1.1",
+    "version": "0.0.6",
     "keywords": [
         "shopware",
         "shopware6",