Fix episode highlight save: preserve structured show-notes fields; v2.0.40

sanitizeFeaturedLinks was silently dropping showNotesSummary, showNotesThemes,
showNotesScripture, showNotesQuotes, and showNotesResources on every save — only
the legacy showNotes string was kept. Added sanitization for all five new fields
and updated the keep-filter to include them.

Also removed set -e from entrypoint.sh and made seed/merge steps non-fatal so a
permissions error on the mounted data volume no longer crash-loops the container.

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

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.0.39",
+  "version": "2.0.40",
   "type": "module",
   "scripts": {
     "dev": "vite",