feat: passhash field added to users table

modules/sql/scheme.sql

@@ -28,6 +28,7 @@ CREATE TABLE images (
 CREATE TABLE users (
     user_id         serial              PRIMARY KEY,
     avatar_id       int                 REFERENCES images (image_id),
+    passhash        text                NOT NULL,
     nickname        varchar(16)         NOT NULL CHECK (nickname ~ '^[a-zA-Z0-9_-]+$'),
     disp_name       varchar(32),
     user_desc       varchar(512),