feat: AMPP folder sync integration — pre-create folder hierarchy on upload, expose lookup endpoint for Script Task: ampp.js

services/mam-api/src/routes/ampp.js

@@ -0,0 +1,35 @@
+import express from 'express';
+import pool from '../db/pool.js';
+
+const router = express.Router();
+// No session auth — called from AMPP Script Task inside broadcast network
+
+/**
+ * GET /api/v1/ampp/folder-for/:filename
+ *
+ * Returns the pre-created AMPP folder:id for a given asset filename.
+ * Called by the simplified AMPP Script Task after ingest to link the asset
+ * without having to parse filename prefixes or create folders itself.
+ *
+ * 200: { folder_id: "abc123" }
+ * 404: { error: "..." }  (file not uploaded through Dragon-Wind — handle gracefully)
+ */
+router.get('/folder-for/:filename', async (req, res, next) => {
+  try {
+    const { filename } = req.params;
+    const result = await pool.query(
+      `SELECT ampp_folder_id FROM assets
+       WHERE filename = $1 AND ampp_folder_id IS NOT NULL
+       ORDER BY created_at DESC LIMIT 1`,
+      [filename]
+    );
+    if (result.rows.length === 0) {
+      return res.status(404).json({ error: 'No AMPP folder mapping found for this filename' });
+    }
+    res.json({ folder_id: result.rows[0].ampp_folder_id });
+  } catch (err) {
+    next(err);
+  }
+});
+
+export default router;