feat(reporting): add Ivanti queue panel for batch FP/Archer staging

Adds a persistent per-user staging queue so analysts can tag findings
during review and batch-process Ivanti workflows in one focused session.

Backend:
- New ivanti_todo_queue table (user-scoped, vendor, workflow_type, status)
- Table auto-created on server startup via idempotent CREATE IF NOT EXISTS
- New route /api/ivanti/todo-queue: GET, POST, PUT/:id, DELETE/:id,
  DELETE/completed — all scoped to req.user.id

Frontend (ReportingPage):
- Fixed checkbox column on findings table; clicking opens an add-to-queue
  popover (portal) with vendor input and FP/Archer toggle
- Already-queued rows show checked/disabled checkbox
- Queue slide-out panel (420px fixed, CSS transition) with items grouped
  by vendor, per-item complete toggle + delete, Clear Completed footer
- Queue button in header with live pending-count badge

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

backend/migrations/add_ivanti_todo_queue_table.js

@@ -0,0 +1,43 @@
+// Migration: Add ivanti_todo_queue table
+const sqlite3 = require('sqlite3').verbose();
+const path = require('path');
+
+const dbPath = path.join(__dirname, '..', 'cve_database.db');
+const db = new sqlite3.Database(dbPath);
+
+console.log('Starting ivanti_todo_queue migration...');
+
+db.serialize(() => {
+    db.run(`
+        CREATE TABLE IF NOT EXISTS ivanti_todo_queue (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            user_id INTEGER NOT NULL,
+            finding_id TEXT NOT NULL,
+            finding_title TEXT,
+            cves_json TEXT,
+            vendor TEXT NOT NULL,
+            workflow_type TEXT NOT NULL CHECK(workflow_type IN ('FP', 'Archer')),
+            status TEXT NOT NULL DEFAULT 'pending' CHECK(status IN ('pending', 'complete')),
+            created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+            updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+        )
+    `, (err) => {
+        if (err) console.error('Error creating table:', err);
+        else console.log('✓ ivanti_todo_queue table created');
+    });
+
+    db.run(
+        'CREATE INDEX IF NOT EXISTS idx_todo_queue_user ON ivanti_todo_queue(user_id, status)',
+        (err) => {
+            if (err) console.error('Error creating index:', err);
+            else console.log('✓ User+status index created');
+        }
+    );
+
+    console.log('✓ Migration statements queued');
+});
+
+db.close(() => {
+    console.log('Migration complete!');
+});