Move descriptions to database, switch to SHA-512 hashes, fix declining invites not working, allow user deletion, fix broken permission checks for many things, security fixes

migrations/20210113202021_add-descriptions.sql

@@ -0,0 +1,15 @@
+ALTER TABLE mods
+    ADD COLUMN body varchar(65536) NOT NULL DEFAULT '';
+ALTER TABLE mods
+    ALTER COLUMN body_url DROP NOT NULL;
+ALTER TABLE versions
+    ADD COLUMN changelog varchar(65536) NOT NULL DEFAULT '';
+
+INSERT INTO users (
+    id, github_id, username, name, email,
+    avatar_url, bio, created
+)
+VALUES (
+           127155982985829, 10137, 'Ghost', NULL, NULL,
+           'https://avatars2.githubusercontent.com/u/10137', 'A deleted user', NOW()
+       );