chore: remove remaining Hetzner references across codebase

Deleted:
- DOCKER_REGISTRY_SETUP.md, QUICK_START_CICD.md (legacy CI/CD docs)
- docs/ULOAD-DEPLOYMENT.md (Hetzner VPS deployment guide)
- scripts/get-ssh-key.sh, scripts/remove-coolify-references.sh (legacy scripts)

Updated Hetzner → MinIO references in:
- shared-storage (package.json, README, client.ts, types.ts)
- App CLAUDE.md files (mukke, storage, planta, picture)
- .claude/GUIDELINES.md, sveltekit-web.md guideline
- TROUBLESHOOTING.md, SETUP_TEMPLATES.md (replaced IPs with placeholders)
- GIT_WORKFLOW.md, COMMANDS.md
- services/matrix-project-doc-bot/CLAUDE.md

Remaining Hetzner mentions are in historical devlogs/audits and docs
that list Hetzner as a hosting alternative (not as active infrastructure).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

COMMANDS.md

@@ -255,11 +255,11 @@ pnpm drizzle-kit studio   # Drizzle Studio
 
 Zentraler Such-Microservice mit SearXNG für Web-Suche und Content-Extraktion.
 
-| Service  | Port | Befehl                    |
-| -------- | ---- | ------------------------- |
-| API      | 3021 | `pnpm dev:search`         |
-| SearXNG  | 8080 | (Docker)                  |
-| Redis    | 6380 | (Docker)                  |
+| Service | Port | Befehl            |
+| ------- | ---- | ----------------- |
+| API     | 3021 | `pnpm dev:search` |
+| SearXNG | 8080 | (Docker)          |
+| Redis   | 6380 | (Docker)          |
 
 ```bash
 # SearXNG + Redis in Docker starten
@@ -489,4 +489,4 @@ pnpm --filter @manacore/shared-ui build
 shared-ui - Gemeinsame UI-Komponenten für alle Web-Apps
 shared-auth - Client-seitige Auth-Integration für Web/Mobile
 shared-nestjs-auth - NestJS Guards/Decorators für JWT-Validierung
-shared-storage - S3-kompatible Storage-Abstraktion (MinIO/Hetzner)
+shared-storage - S3-kompatible Storage-Abstraktion (MinIO)