clean up sentry notification and avoid logger.exception when we do not want sentry

spiffworkflow-backend/src/spiffworkflow_backend/exceptions/api_error.py

@@ -171,18 +171,30 @@ def set_user_sentry_context() -> None:
     set_tag("username", username)
 
 
+def should_notify_sentry(exception: Exception) -> bool:
+    """Determine if we should notify sentry.
+
+    We want to capture_exception to log the exception to sentry, but we don't want to log:
+      1. ApiErrors that are just invalid tokens
+      2. NotAuthorizedError. we usually call check-permissions before calling an API to
+         make sure we'll have access, but there are some cases
+         where it's more convenient to just make the call from the frontend and handle the 403 appropriately.
+    """
+    if isinstance(exception, ApiError):
+        if exception.error_code == "invalid_token":
+            return False
+    if isinstance(exception, NotAuthorizedError):
+        return False
+    return True
+
+
 @api_error_blueprint.app_errorhandler(Exception)  # type: ignore
 def handle_exception(exception: Exception) -> flask.wrappers.Response:
     """Handles unexpected exceptions."""
     set_user_sentry_context()
 
     sentry_link = None
-    # we want to capture_exception to log the exception to sentry, but we don't want to log:
-    #   1. ApiErrors that are just invalid tokens
-    #   2. NotAuthorizedError
-    if (
-        not isinstance(exception, ApiError) or exception.error_code != "invalid_token"
-    ) and not isinstance(exception, NotAuthorizedError):
+    if should_notify_sentry(exception):
         id = capture_exception(exception)
 
         if isinstance(exception, ApiError):
@@ -202,6 +214,12 @@ def handle_exception(exception: Exception) -> flask.wrappers.Response:
         # seems to break the sentry sdk context where we no longer get back
         # an event id or send out tags like username
         current_app.logger.exception(exception)
+    else:
+        current_app.logger.error(
+            f"Received exception: {exception}. Since we do not want this particular"
+            " exception in sentry, we cannot use logger.exception, so there will be no"
+            " backtrace. see api_error.py"
+        )
 
     error_code = "internal_server_error"
     status_code = 500