core: handle generic exceptions

core/osrd-reporting/src/main/java/fr/sncf/osrd/reporting/exceptions/ErrorType.java

@@ -45,6 +45,11 @@ public enum ErrorType {
             "assert check failed",
             ErrorCause.INTERNAL
     ),
+    UnknownError(
+            "unknown_error",
+            "An unknown exception was thrown",
+            ErrorCause.INTERNAL
+    ),
     InfraSoftLoadingError(
             "infra_loading:soft_error",
             "soft error while loading new infra",

core/osrd-reporting/src/main/java/fr/sncf/osrd/reporting/exceptions/OSRDError.java

@@ -102,6 +102,20 @@ public static OSRDError newAssertionWrapper(AssertionError assertionError) {
         return error;
     }
 
+    /**
+     * Creates a new OSRDError from an unknown Throwable.
+     *
+     * @param error the throwable error
+     * @return a new OSRDError instance
+     */
+    public static OSRDError newUnknownError(Throwable error) {
+        var wrapper = new OSRDError(ErrorType.UnknownError);
+        wrapper.context.put("message", error.getMessage());
+        wrapper.context.put("exception_type", error.getClass().toString());
+        wrapper.context.put("stack_trace", convertStackTrace(error.getStackTrace()));
+        return wrapper;
+    }
+
     /**
      * Creates a new OSRDError for an infrastructure loading error.
      *

core/src/main/java/fr/sncf/osrd/api/ExceptionHandler.java

@@ -19,10 +19,7 @@ public static Response handle(Throwable ex) {
         else if (ex instanceof AssertionError)
             return toResponse(OSRDError.newAssertionWrapper((AssertionError) ex));
         else {
-            return new RsWithStatus(
-                    new RsWithBody(ex.toString()),
-                    500
-            );
+            return toResponse(OSRDError.newUnknownError(ex));
         }
     }