feat(constraint_graph): add visualization functionality to the constraint graph (#4701)

crates/euclid/src/dssa/graph.rs

@@ -22,6 +22,12 @@ pub mod euclid_graph_prelude {
 
 impl cgraph::KeyNode for dir::DirKey {}
 
+impl cgraph::NodeViz for dir::DirKey {
+    fn viz(&self) -> String {
+        self.kind.to_string()
+    }
+}
+
 impl cgraph::ValueNode for dir::DirValue {
     type Key = dir::DirKey;
 
@@ -30,6 +36,41 @@ impl cgraph::ValueNode for dir::DirValue {
     }
 }
 
+impl cgraph::NodeViz for dir::DirValue {
+    fn viz(&self) -> String {
+        match self {
+            Self::PaymentMethod(pm) => pm.to_string(),
+            Self::CardBin(bin) => bin.value.clone(),
+            Self::CardType(ct) => ct.to_string(),
+            Self::CardNetwork(cn) => cn.to_string(),
+            Self::PayLaterType(plt) => plt.to_string(),
+            Self::WalletType(wt) => wt.to_string(),
+            Self::UpiType(ut) => ut.to_string(),
+            Self::BankTransferType(btt) => btt.to_string(),
+            Self::BankRedirectType(brt) => brt.to_string(),
+            Self::BankDebitType(bdt) => bdt.to_string(),
+            Self::CryptoType(ct) => ct.to_string(),
+            Self::RewardType(rt) => rt.to_string(),
+            Self::PaymentAmount(amt) => amt.number.to_string(),
+            Self::PaymentCurrency(curr) => curr.to_string(),
+            Self::AuthenticationType(at) => at.to_string(),
+            Self::CaptureMethod(cm) => cm.to_string(),
+            Self::BusinessCountry(bc) => bc.to_string(),
+            Self::BillingCountry(bc) => bc.to_string(),
+            Self::Connector(conn) => conn.connector.to_string(),
+            Self::MetaData(mv) => format!("[{} = {}]", mv.key, mv.value),
+            Self::MandateAcceptanceType(mat) => mat.to_string(),
+            Self::MandateType(mt) => mt.to_string(),
+            Self::PaymentType(pt) => pt.to_string(),
+            Self::VoucherType(vt) => vt.to_string(),
+            Self::GiftCardType(gct) => gct.to_string(),
+            Self::BusinessLabel(bl) => bl.value.to_string(),
+            Self::SetupFutureUsage(sfu) => sfu.to_string(),
+            Self::CardRedirectType(crt) => crt.to_string(),
+        }
+    }
+}
+
 #[derive(Debug, Clone, serde::Serialize)]
 #[serde(tag = "type", content = "details", rename_all = "snake_case")]
 pub enum AnalysisError<V: cgraph::ValueNode> {

crates/euclid/src/frontend/dir.rs

@@ -289,7 +289,6 @@ pub enum DirKeyKind {
     #[serde(rename = "billing_country")]
     BillingCountry,
     #[serde(skip_deserializing, rename = "connector")]
-    #[strum(disabled)]
     Connector,
     #[strum(
         serialize = "business_label",