Add curator Influences tool with import wizard, CRUD, and graph.

CSV/JSON/XLSX mapping wizard expands artist-level rows to all paintings, blocks duplicate file/data imports via content and payload hashes, and documents the workflow in influence-import.md.

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -67,14 +67,16 @@
   "type": "commonjs",
   "dependencies": {
     "bcryptjs": "^3.0.3",
-    "connect-pg-simple": "^10.0.0",
     "compression": "^1.8.1",
+    "connect-pg-simple": "^10.0.0",
     "cors": "^2.8.6",
+    "csv-parse": "^7.0.1",
     "dotenv": "^17.4.2",
     "express": "^5.2.1",
     "express-session": "^1.19.0",
     "pg": "^8.21.0",
-    "sharp": "^0.35.1"
+    "sharp": "^0.35.1",
+    "xlsx": "^0.18.5"
   },
   "devDependencies": {
     "nodemon": "^3.1.14"