Feat(Fix): Multi-Tenant Zerotier Org Setups

Imports Network From Zerotier
Async Emails
Migration guardrails
Admin to see all approvals states

gatehouse_app/api/v1/auth/core.py

@@ -39,7 +39,7 @@ def register():
                 f"{verify_link}\n\n"
                 f"Gatehouse Security Team"
             )
-            NotificationService._send_email(to_address=user.email, subject=subject, body=body)
+            NotificationService._send_email_async(to_address=user.email, subject=subject, body=body)
         except Exception as exc:
             logging.getLogger(__name__).warning(f"Failed to send verification email on register: {exc}")
 

gatehouse_app/api/v1/auth/password.py

@@ -27,7 +27,7 @@ def forgot_password():
             reset_token = PasswordResetToken.generate(user_id=user.id)
             app_url = current_app.config.get("APP_URL", "http://localhost:8080")
             reset_link = f"{app_url}/reset-password?token={reset_token.token}"
-            NotificationService._send_email(
+            NotificationService._send_email_async(
                 to_address=user.email,
                 subject="Reset your Gatehouse password",
                 body=(
@@ -129,7 +129,7 @@ def resend_verification():
             verify_token = EmailVerificationToken.generate(user_id=user.id)
             app_url = current_app.config.get("APP_URL", "http://localhost:8080")
             verify_link = f"{app_url}/verify-email?token={verify_token.token}"
-            NotificationService._send_email(
+            NotificationService._send_email_async(
                 to_address=user.email,
                 subject="Verify your Gatehouse email address",
                 body=(
@@ -200,7 +200,7 @@ def resend_activation():
 
             app_url = current_app.config.get("APP_URL", current_app.config.get("FRONTEND_URL", "http://localhost:8080"))
             activate_link = f"{app_url}/activate?code={code}"
-            NotificationService._send_email(
+            NotificationService._send_email_async(
                 to_address=user.email,
                 subject="Activate your Gatehouse account",
                 body=(