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/operator_login.go

@@ -0,0 +1,58 @@
+package onboarding
+
+import (
+	"context"
+	"net/http"
+)
+
+// Each view is a request-local value. Pools and immutable configuration are
+// shared; customer and operator credentials, sessions and cookies are separate.
+func (s *Service) operatorView() *Service {
+	view := *s
+	view.operatorLogin = true
+	return &view
+}
+func (s *Service) loginSessionTable() string {
+	if s.operatorLogin {
+		return "operator_login_session"
+	}
+	return "customer_login_session"
+}
+func (s *Service) loginSMSTable() string {
+	if s.operatorLogin {
+		return "operator_sms_challenge"
+	}
+	return "customer_sms_challenge"
+}
+func (s *Service) phoneCredentialTable() string {
+	if s.operatorLogin {
+		return "operator_phone_credential"
+	}
+	return "customer_phone_credential"
+}
+func (s *Service) accountSessionTable() string {
+	if s.operatorLogin {
+		return "operator_account_session"
+	}
+	return "onboarding_account_session"
+}
+func (s *Service) accountPredicate() string {
+	if s.operatorLogin {
+		return "ua.account_kind='operator' AND ua.platform_role IN ('ops_admin','ops_operator','ops_approver','ops_viewer')"
+	}
+	return "ua.account_kind='customer' AND ua.platform_role='customer'"
+}
+func (s *Service) logoutKinds() []bool {
+	if s.operatorLogin {
+		return []bool{true}
+	}
+	return []bool{true, false}
+}
+
+func (s *Service) OperatorAuth(next http.Handler) http.Handler {
+	return s.operatorView().CustomerAuth(next)
+}
+
+func (s *Service) ProvisionOperatorPhone(ctx context.Context, userID, issuer, subject, phone, password, requestID string) (bool, error) {
+	return s.operatorView().provisionPhone(ctx, userID, issuer, subject, phone, password, requestID)
+}