Add openrpc API

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

src/models/context.rs

@@ -2,7 +2,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::time::Timestamp;
 
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct Context {
     /// Redis DB to use
     id: u32,