chore: remove vibe-coding artifacts from tracking, sync notes and obsidian config

- Untrack .claude/launch.json (Claude Code config)
- Add .claude/, .mcp.json, CLAUDE.md, and AI-generated CSVs to .gitignore
- Add _notes/ vault (architecture, API, tasks, bugs, infra docs)
- Add .obsidian/ plugin/vault config (workspace state excluded)
- Sync CHANGELOG.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_notes/09 - Projects/Backend - Django.md

@@ -0,0 +1,67 @@
+# Backend — Django API
+
+**API Base URL (UAT):** `https://uat.eventifyplus.com/api/`
+**API Base URL (Prod):** `https://prod.eventifyplus.com/api`
+**Local Path:** `/Users/bshtechnologies/Documents/eventify_backend/`
+**SSH Access:** `ssh eventify` (see [[10 - Infrastructure/Server & Docker]])
+
+---
+
+## Tech Stack
+
+| Layer | Technology |
+|-------|-----------|
+| Framework | Django >= 4.2 |
+| Language | Python |
+| Image Processing | Pillow |
+| Database | Configured via env vars |
+| API Docs | `API_Documentation.md` in project root |
+
+## Django Apps / Modules
+
+| Module | Purpose |
+|--------|---------|
+| `accounts` | User management, authentication |
+| `events` | Event CRUD, event types, event images |
+| `bookings` | Event booking system |
+| `reviews` | User reviews for events |
+| `ledger` | Financial / points ledger |
+| `banking_operations` | Payment & banking |
+| `eventify_logger` | Logging infrastructure |
+| `gamification` | EP, RP, achievements, leaderboard |
+
+## Models (Key)
+- **Custom User** — extended Django user model
+- **Event** — core event entity
+- **EventType** — event categories
+- **EventImages** — media for events
+- **Booking** — event reservations
+
+## Environment Variables
+```
+DJANGO_SECRET_KEY=replace-me
+DJANGO_DEBUG=False
+DJANGO_ALLOWED_HOSTS=localhost,127.0.0.1
+```
+
+## Accessing the Server
+
+```bash
+ssh eventify
+# connects to: ubuntu@ec2-174-129-72-160.compute-1.amazonaws.com
+# key: ~/.ssh/eventify_keys_21_03_2026.pem
+```
+
+## API Documentation
+Full endpoint reference: `eventify_backend/API_Documentation.md`
+
+See also: [[04 - API & Backend/API Notes]]
+
+## Notes
+
+## Related
+- [[App - Web Frontend]]
+- [[Admin - Command Center]]
+- [[Partner Portal]]
+- [[Mobile - Flutter]]
+- [[10 - Infrastructure/Server & Docker]]