fix(migrations): include ip_address in add_card_workflow_type table recreate

The column was missing from the new table definition, causing the
INSERT...SELECT to fail on any DB that already had ip_address (e.g.
auto-created by the updated server.js).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/migrations/add_card_workflow_type.js

@@ -24,6 +24,7 @@ db.serialize(() => {
             finding_id TEXT NOT NULL,
             finding_title TEXT,
             cves_json TEXT,
+            ip_address TEXT,
             vendor TEXT NOT NULL,
             workflow_type TEXT NOT NULL CHECK(workflow_type IN ('FP', 'Archer', 'CARD')),
             status TEXT NOT NULL DEFAULT 'pending' CHECK(status IN ('pending', 'complete')),