Podcast workflow: assign lanes by hand, match by season, unique keys for unseasoned episodes; drop old checklist data file; v2.16.0

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.15.2",
+  "version": "2.16.0",
   "type": "module",
   "scripts": {
     "dev": "vite",