feat: DX RATING calculation

Cargo.lock

@@ -1342,6 +1342,29 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rust_decimal"
+version = "1.37.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b203a6425500a03e0919c42d3c47caca51e79f1132046626d2c8871c5092035d"
+dependencies = [
+ "arrayvec",
+ "num-traits",
+ "rust_decimal_macros",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "rust_decimal_macros"
+version = "1.37.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6268b74858287e1a062271b988a0c534bf85bbeb567fe09331bf40ed78113d5"
+dependencies = [
+ "quote",
+ "syn 2.0.104",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.26"
@@ -1459,6 +1482,7 @@ dependencies = [
  "hmac-sha256",
  "md5",
  "nyquest",
+ "rust_decimal",
  "rustc-hash",
  "serde",
  "serde_json",