Use MySQL and Merchant Statements

Changes

🚀 Features

• Added attachment support @StuartFerguson (#74)

🧰 Maintenance

• Add missing config setting @StuartFerguson (#67)
• Update to the shared nugets @StuartFerguson (#72)
• Create job when nightly build fails @StuartFerguson (#63)
• Bump Microsoft.AspNetCore.Authentication.JwtBearer from 5.0.4 to 5.0.9 in /MessagingService @dependabot (#61)