feat: expand companion platform, device controls, and memoir workflows

Add customer and operator login, BLE provisioning, device fleet controls, call memory, memoir generation, and refreshed family and maintenance portals. Include API contracts, migrations, firmware sources, tests, assets, and deployment documentation.

cmd/workflow-model-bridge/main.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"data-terminal-cloud/internal/workflowbridge"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+func secret(name string) string {
+	if p := os.Getenv(name + "_FILE"); p != "" {
+		b, err := os.ReadFile(p)
+		if err != nil {
+			log.Fatal("secret file unavailable")
+		}
+		return strings.TrimSpace(string(b))
+	}
+	return strings.TrimSpace(os.Getenv(name))
+}
+func main() {
+	key, admin := secret("ARK_API_KEY"), secret("DIFY_BRIDGE_SECRET")
+	if key == "" || admin == "" {
+		log.Fatal("bridge credentials missing")
+	}
+	base := os.Getenv("ARK_BASE_URL")
+	if base == "" {
+		base = "https://ark.cn-beijing.volces.com/api/v3"
+	}
+	service, err := workflowbridge.NewArkService(admin, base, key)
+	if err != nil {
+		log.Fatal("model configuration invalid")
+	}
+	server := &http.Server{Addr: ":8188", Handler: service, ReadHeaderTimeout: 10 * time.Second, IdleTimeout: 30 * time.Second}
+	log.Fatal(server.ListenAndServe())
+}