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>

apps/storage/CLAUDE.md

@@ -58,7 +58,7 @@ pnpm build                       # Build for production
 - **Web**: SvelteKit 2.x, Svelte 5 (runes mode), Tailwind CSS
 - **Landing**: Astro 5.x, Tailwind CSS
 - **Backend**: NestJS 11, Drizzle ORM, PostgreSQL
-- **Storage**: S3-compatible (MinIO local, Hetzner production)
+- **Storage**: S3-compatible (MinIO)
 - **Types**: TypeScript 5.x
 
 ## Architecture