feat: registry_api + fn sync — sincronización de registry.db entre PCs

Nuevo sistema para mantener datos no regenerables (proposals, apps, projects,
analysis, vaults, pc_locations) sincronizados entre múltiples máquinas via
una API HTTP central desplegada en organic-machine.com.

- Migración 011: tabla pc_locations (mapa de ubicaciones por PC)
- registry/models.go: struct PcLocation
- registry/store.go: CRUD PcLocation + helpers de sync
- cmd/fn/sync.go: subcomando fn sync (push+pull, status, locations)
- bash/functions/infra/setup_registry_api: pipeline de deploy Docker+Traefik
- CLAUDE.md: documentación de sync y pc_locations

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

cmd/fn/main.go

@@ -43,6 +43,8 @@ func main() {
 		cmdApp(os.Args[2:])
 	case "analysis":
 		cmdAnalysis(os.Args[2:])
+	case "sync":
+		cmdSync(os.Args[2:])
 	case "help", "-h", "--help":
 		printUsage()
 	default:
@@ -67,7 +69,8 @@ Usage:
   fn proposal <add|list|show|update>       Gestiona proposals
   fn project <init|list|show|status>       Gestiona proyectos
   fn app     <list|clone|pull>             Gestiona apps externas (Gitea)
-  fn analysis <list|clone|pull>            Gestiona analyses externas (Gitea)`)
+  fn analysis <list|clone|pull>            Gestiona analyses externas (Gitea)
+  fn sync    [status|locations]            Sincroniza con servidor central`)
 }
 
 func root() string {