refactor(ci): otimiza workflows Forgejo removendo steps desnecessarios

- Remove setup pnpm e Node.js (bun ja inclui Node.js)
- Remove steps Verify Bun e Permissions diagnostic
- Remove Prune workspace (criava pnpm-workspace.yaml)
- Remove smoke test (register + heartbeat) - nao mais necessario
- Atualiza chaves de cache para usar apenas bun.lock
- Atualiza docs para indicar desktop_release comentado

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/FORGEJO-CI-CD.md

@@ -141,9 +141,9 @@ Triggers:
 
 Jobs:
 1. **changes** - Detecta arquivos alterados
-2. **deploy** - Deploy na VPS (Next.js + Docker Swarm)
+2. **deploy** - Deploy na VPS (Next.js + Docker Swarm, usando Bun)
 3. **convex_deploy** - Deploy das functions Convex
-4. **desktop_release** - Build do app desktop (tags `v*`)
+4. ~~**desktop_release**~~ - Build do app desktop (comentado - sem runner Windows)
 
 ### quality-checks.yml