Add user update endpoint

backend/migrations/5_users.sql

@@ -1,12 +1,13 @@
 CREATE TABLE users
 (
-    id                 INTEGER              PRIMARY KEY AUTOINCREMENT NOT NULL,
-    username           TEXT                 NOT NULL,
-    fullname           TEXT                 ,
-    role               TEXT                 NOT NULL,
-    password_hash      TEXT                 NOT NULL,
-    last_activity_at   DATETIME             ,
-    updated_at         DATETIME             NOT NULL DEFAULT CURRENT_TIMESTAMP,
-    created_at         DATETIME             NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    id                     INTEGER         PRIMARY KEY AUTOINCREMENT NOT NULL,
+    username               TEXT            NOT NULL,
+    fullname               TEXT            ,
+    role                   TEXT            NOT NULL,
+    password_hash          TEXT            NOT NULL,
+    needs_password_change  BOOLEAN         NOT NULL DEFAULT TRUE,
+    last_activity_at       DATETIME        ,
+    updated_at             DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    created_at             DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
     UNIQUE(username)
 );