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.

internal/onboarding/call_auth.go

@@ -0,0 +1,26 @@
+package onboarding
+
+import (
+	"data-terminal-cloud/internal/deviceauth"
+	"mime"
+	"net/http"
+	"time"
+)
+
+// AuthenticateCallRequest verifies ONBOARDING-1.1 identity without applying the
+// legacy voice route's admission rules. CALL-MEMORY-1.1 performs its own scoped
+// admission and allows old-session end receipts without issuing new authority.
+func (s *Service) AuthenticateCallRequest(r *http.Request) (deviceauth.Identity, []byte, []byte, error) {
+	mediaType, _, mediaErr := mime.ParseMediaType(r.Header.Get("Content-Type"))
+	if !s.secure(r) || r.URL.RawQuery != "" || mediaErr != nil || mediaType != "application/json" {
+		return deviceauth.Identity{}, nil, nil, errAuth
+	}
+	d, raw, e := s.authenticate(r)
+	if e != nil {
+		return deviceauth.Identity{}, nil, nil, e
+	}
+	if e = s.limit(r.Context(), "call-device:"+d.ID, 300, time.Minute); e != nil {
+		return deviceauth.Identity{}, nil, nil, e
+	}
+	return deviceauth.Identity{ID: d.ID, PublicID: d.PublicID, TenantID: d.TenantID, Status: d.Status, ActivationState: d.Lifecycle, EnrollmentMode: d.Mode, BindingGeneration: d.Generation, CredentialRef: "onboarding://" + d.FactoryID}, d.Key, raw, nil
+}