fix: wrong column type for reauthentication tokens in Postgres (#869)

backend/resources/migrations/postgres/20250814121300_requires_reauthentication.up.sql

@@ -5,7 +5,7 @@ CREATE TABLE reauthentication_tokens (
     created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
     token TEXT NOT NULL UNIQUE,
     expires_at TIMESTAMPTZ NOT NULL,
-    user_id TEXT NOT NULL REFERENCES users ON DELETE CASCADE
+    user_id uuid NOT NULL REFERENCES users ON DELETE CASCADE
 );
 
 CREATE INDEX idx_reauthentication_tokens_token ON reauthentication_tokens(token);