refactor(gsm): add error_category column to gsm table (#6648)

Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>

crates/common_enums/src/enums.rs

@@ -3372,3 +3372,28 @@ pub enum ConnectorMandateStatus {
     /// Indicates that the connector mandate  is not active and hence cannot be used for payments.
     Inactive,
 }
+
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    strum::Display,
+    PartialEq,
+    Eq,
+    serde::Serialize,
+    serde::Deserialize,
+    strum::EnumString,
+    ToSchema,
+    PartialOrd,
+    Ord,
+)]
+#[router_derive::diesel_enum(storage_type = "text")]
+#[serde(rename_all = "snake_case")]
+#[strum(serialize_all = "snake_case")]
+pub enum ErrorCategory {
+    FrmDecline,
+    ProcessorDowntime,
+    ProcessorDeclineUnauthorized,
+    IssueWithPaymentMethod,
+    ProcessorDeclineIncorrectData,
+}