Fix GH commit status path and how non-open PRs are evaluated

Previously, empty and non-open PRs from Github would be evaluated in such a way to look valid when there is no commit data to evaluate. This is inaccurate as we should instead throw or indicate that the PR is closed.

config/mariadb/initdb.d/init.sql

@@ -41,9 +41,8 @@ ALTER TABLE CommitValidationMessage ADD COLUMN IF NOT EXISTS `committerEmail` va
 
 CREATE TABLE GithubWebhookTracking (
   id SERIAL NOT NULL,
-  fingerprint varchar(127) NOT NULL,
   installationId varchar(63) NOT NULL,
-  deliveryId varchar(63) NOT NULL,
+  lastKnownState varchar(63) NOT NULL,
   headSha varchar(63) NOT NULL,
   repositoryFullName varchar(127) NOT NULL,
   pullRequestNumber int NOT NULL,