feat: complete the test with two contexts and two users

[metacoma]

• Create the first context
• Create the second context
• Create a user in the first context
• Create a user in the second context
• Send a ping/pong event in the first context
  • Ensure that the pong was received in the NATS topic
  • Ensure there are no errors in the dead-letter pod
  • Ensure that the pong was not received in the NATS topic in the second context
• Send a ping/pong event in the second context
  • Ensure that the pong was received in the NATS topic
  • Ensure there are no errors in the dead-letter pod
  • Ensure that the pong was not received in the NATS topic in the first context
• Repeat the same flow with the io-document event