feat: add support for exception mechanism metadata

interfaces.go

@@ -204,13 +204,24 @@ func NewRequest(r *http.Request) *Request {
 	}
 }
 
+// Mechanism is the mechanism by which an exception was generated and handled.
+type Mechanism struct {
+	Type        string                 `json:"type,omitempty"`
+	Synthetic   *bool                  `json:"synthetic,omitempty"`
+	Description string                 `json:"description,omitempty"`
+	HelpLink    string                 `json:"help_link,omitempty"`
+	Handled     *bool                  `json:"handled,omitempty"`
+	Data        map[string]interface{} `json:"data,omitempty"`
+}
+
 // Exception specifies an error that occurred.
 type Exception struct {
 	Type       string      `json:"type,omitempty"`  // used as the main issue title
 	Value      string      `json:"value,omitempty"` // used as the main issue subtitle
 	Module     string      `json:"module,omitempty"`
 	ThreadID   string      `json:"thread_id,omitempty"`
 	Stacktrace *Stacktrace `json:"stacktrace,omitempty"`
+	Mechanism  *Mechanism  `json:"mechanism,omitempty"`
 }
 
 // SDKMetaData is a struct to stash data which is needed at some point in the SDK's event processing pipeline