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>

services/matrix-project-doc-bot/CLAUDE.md

@@ -9,7 +9,7 @@ Matrix Project Doc Bot collects photos, voice notes, and text for projects and g
 - **Framework**: NestJS 10
 - **Matrix**: matrix-bot-sdk
 - **Database**: Drizzle ORM + PostgreSQL
-- **Storage**: S3 (MinIO locally, Hetzner in production)
+- **Storage**: S3 (MinIO)
 - **AI**: OpenAI (Whisper for transcription, GPT-4o-mini for generation)
 
 ## Commands