Update gems and fix lint to clear CI failures

Bumps dependencies (jwt 3.2.0, puma 8.0.2, net-imap 0.6.4.1 and others
via bundle update) to resolve bundler-audit advisories, and applies
standardrb autofixes so the lint job passes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

db/migrate/20260420073319_add_oidc_authorization_code_id_to_tokens.rb

@@ -1,8 +1,8 @@
 class AddOidcAuthorizationCodeIdToTokens < ActiveRecord::Migration[8.1]
   def change
     add_reference :oidc_access_tokens, :oidc_authorization_code,
-                  null: true, foreign_key: true, index: true
+      null: true, foreign_key: true, index: true
     add_reference :oidc_refresh_tokens, :oidc_authorization_code,
-                  null: true, foreign_key: true, index: true
+      null: true, foreign_key: true, index: true
   end
 end