feat(quick-261008-w5w): Modul-Changelog Durchstich mit Nextcloud-Status

- Typen, Register, Route GET /modules/changelog/:slug, Waechter-Test
- Seed liest die Version per latestVersion aus dem Changelog
- Marktplatz-Detailseite zeigt den Abschnitt Aenderungen

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/web/src/messages/en.json

@@ -1234,6 +1234,12 @@
     "tenantContextLabel": "Organization",
     "backToMarketplace": "Back to Marketplace",
     "detailVersion": "Version {version}",
+    "changelogTitle": "Changes",
+    "changelogCurrent": "Current",
+    "changelogRelease": "Version {version}, {date}",
+    "changelogKindNew": "New",
+    "changelogKindChanged": "Changed",
+    "changelogKindFixed": "Fixed",
     "detailStatusActive": "Activated",
     "detailStatusInactive": "Not activated",
     "accessDenied": "Access denied",