feat: add Ivanti FP workflow submission from Queue

- Add shared ivantiApi.js helper (ivantiPost + ivantiMultipartPost)
- Add ivantiFpWorkflow.js backend route with validation, Ivanti API
  workflow creation, attachment uploads, submission tracking, and audit
- Add add_fp_submissions_table.js migration
- Wire route into server.js at /api/ivanti/fp-workflow
- Add FpWorkflowModal component in ReportingPage.js with form fields,
  drag-and-drop file upload, progress indicator, and result views
- Add Create FP Workflow button to QueuePanel footer (editor/admin only)
- Refactor ivantiWorkflows.js and ivantiFindings.js to use shared helper

backend/helpers/ivantiApi.js

@@ -0,0 +1,91 @@
+// Shared Ivanti / RiskSense API helpers
+// Centralizes HTTP calls so ivantiWorkflows.js, ivantiFindings.js, and
+// ivantiFpWorkflow.js all use the same implementation.
+
+const https = require('https');
+
+const IVANTI_URL_BASE = 'https://platform4.risksense.com/api/v1';
+
+// ---------------------------------------------------------------------------
+// JSON POST — used for search, workflow creation, etc.
+// ---------------------------------------------------------------------------
+function ivantiPost(urlPath, body, apiKey, skipTls) {
+    const bodyStr = JSON.stringify(body);
+    const fullUrl = new URL(IVANTI_URL_BASE + urlPath);
+
+    return new Promise((resolve, reject) => {
+        const options = {
+            hostname: fullUrl.hostname,
+            path: fullUrl.pathname + fullUrl.search,
+            method: 'POST',
+            headers: {
+                'accept': '*/*',
+                'content-type': 'application/json',
+                'x-api-key': apiKey,
+                'x-http-client-type': 'browser',
+                'content-length': Buffer.byteLength(bodyStr)
+            },
+            rejectUnauthorized: !skipTls,
+            timeout: 15000
+        };
+
+        const req = https.request(options, (res) => {
+            let data = '';
+            res.on('data', (chunk) => { data += chunk; });
+            res.on('end', () => resolve({ status: res.statusCode, body: data }));
+        });
+
+        req.on('timeout', () => req.destroy(new Error('Request timed out')));
+        req.on('error', reject);
+        req.write(bodyStr);
+        req.end();
+    });
+}
+
+// ---------------------------------------------------------------------------
+// Multipart POST — used for file attachment uploads.
+// Constructs multipart/form-data manually using Node's https module.
+// ---------------------------------------------------------------------------
+function ivantiMultipartPost(urlPath, fileBuffer, fileName, apiKey, skipTls) {
+    const boundary = '----IvantiUpload' + Date.now().toString(36) + Math.random().toString(36).slice(2);
+    const fullUrl = new URL(IVANTI_URL_BASE + urlPath);
+
+    // Build multipart body
+    const preamble = Buffer.from(
+        `--${boundary}\r\n` +
+        `Content-Disposition: form-data; name="file"; filename="${fileName}"\r\n` +
+        `Content-Type: application/octet-stream\r\n\r\n`
+    );
+    const epilogue = Buffer.from(`\r\n--${boundary}--\r\n`);
+    const bodyBuffer = Buffer.concat([preamble, fileBuffer, epilogue]);
+
+    return new Promise((resolve, reject) => {
+        const options = {
+            hostname: fullUrl.hostname,
+            path: fullUrl.pathname + fullUrl.search,
+            method: 'POST',
+            headers: {
+                'accept': '*/*',
+                'content-type': `multipart/form-data; boundary=${boundary}`,
+                'x-api-key': apiKey,
+                'x-http-client-type': 'browser',
+                'content-length': bodyBuffer.length
+            },
+            rejectUnauthorized: !skipTls,
+            timeout: 30000
+        };
+
+        const req = https.request(options, (res) => {
+            let data = '';
+            res.on('data', (chunk) => { data += chunk; });
+            res.on('end', () => resolve({ status: res.statusCode, body: data }));
+        });
+
+        req.on('timeout', () => req.destroy(new Error('Request timed out')));
+        req.on('error', reject);
+        req.write(bodyBuffer);
+        req.end();
+    });
+}
+
+module.exports = { IVANTI_URL_BASE, ivantiPost, ivantiMultipartPost };