many fixes resultnig from latest refactoring

src/routes/auth.routes.ts

@@ -76,7 +76,7 @@ router.post('/register', async (req, res, next) => {
     newUser = await repoWithTransaction.createUser(email, hashedPassword, { full_name, avatar_url });
 
     await client.query('COMMIT');
-  } catch (error: any) {
+  } catch (error: unknown) {
     if (error instanceof UniqueConstraintError) {
       // If the email is a duplicate, return a 409 Conflict status.
       return res.status(409).json({ message: error.message });