Three main reasons: 1. I've messed around with the language enough that it's familiar to me 2. This gateway is mostly about converting data between form

Three main reasons: 1. I've messed around with the language enough that it's familiar to me 2. This gateway is mostly about converting data between formats, and I find Ballerina easier for that 3. I was not looking for super low-latency as a typical gateway because LLMs are slower than stateless services