docs: Add some additional context to write_buffer_routes.rs
//!
//! The goal is that eventually the implementation in these routes
//! will replace the implementation in http_routes.rs
+//!
+//! Note that these routes are designed to be just helpers for now,
+//! and "close enough" to the real /v2 api to be able to test Delorean
+//! without needing to create and manage a mapping layer from name -->
+//! id (this is done by other services in the influx cloud)
+//!
+//! Long term, we expect to create delorean specific api in terms of
+//! database names and may remove this quasi /v2 API from the Deloren.
#![deny(rust_2018_idioms)]
