Add upload email notifications with Seafile direct-upload watcher; v2.0.6

- Portal uploads send one email immediately (host, episode, passage,
  description, filenames) via Resend to NUGGETS_NOTIFY_EMAIL
- Seafile watcher polls /Episode Upload every 15 min for direct uploads
  and sends a notification for any new file not already seen via portal
- Files uploaded through the portal are marked seen so the watcher
  never sends a duplicate notification
- Credentials kept out of git: SEAFILE_TOKEN, SEAFILE_NUGGETS_REPO_ID,
  NUGGETS_NOTIFY_EMAIL now sourced from docker .env file

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

docker-compose.yml

@@ -11,11 +11,12 @@ services:
       - ADMIN_PASSWORD=`generate a random password and set it here`
       - RESEND_API_KEY=`set your Resend API key here`
       # Seafile integration for Nuggets host upload portal
-      # Get SEAFILE_TOKEN from: Seafile → Profile → Settings → API Token → Generate
-      # Get SEAFILE_NUGGETS_REPO_ID from the URL when viewing the Nuggets library in Seafile
+      # Set SEAFILE_TOKEN and SEAFILE_NUGGETS_REPO_ID in a .env file alongside this compose file
       - SEAFILE_URL=https://seafile.necloud.us
-      - SEAFILE_TOKEN=your_seafile_api_token_here
-      - SEAFILE_NUGGETS_REPO_ID=your_repo_id_here
+      - SEAFILE_TOKEN=${SEAFILE_TOKEN}
+      - SEAFILE_NUGGETS_REPO_ID=${SEAFILE_NUGGETS_REPO_ID}
+      # Upload notification email (defaults to RESEND_TO if not set)
+      - NUGGETS_NOTIFY_EMAIL=${NUGGETS_NOTIFY_EMAIL}
     volumes:
       - /media/ZimaOS-HD/AppData/siteforge/data:/app/data
     restart: unless-stopped