AddPatientDetails handles adding patient details.

AdmitPatientForHospitalization handles bed assignment and patient data without marking hospitalization.

GenerateAndSendOTP generates an OTP, stores it in Redis, and sends it via email.

Handler to check and remove a patient from the Redis queue.

SubscribeToHospitalizationUpdates listens for Redis messages about patient hospitalization.

SubscribeToPaymentUpdates listens for payment updates from Redis.

VerifyOtp verifies the provided OTP against the stored OTP.