Emails you when any configured blog publishes a new essay.

1. A cron run fetches each configured blog homepage or feed and parses its configured section heading, article list, or RSS category.
2. It stores each latest essay ID in Val Town Blob Storage:
   • steve_krouse_latest_essay_v1
   • russel_power_latest_essay_v1
   • anthropic_engineering_latest_essay_v1
   • openai_engineering_latest_essay_v1
3. It only sends an email when a blog's top essay changes.

• First run initializes state for each blog and does not send an email.
• Subsequent runs send one email per newly detected essay per blog.
• This val is cron-only (no manual HTTP trigger).
• Optional env vars for separate recipients:
  • STEVE_KROUSE_NOTIFY_EMAIL
  • RUSSEL_POWER_NOTIFY_EMAIL
  • ANTHROPIC_ENGINEERING_NOTIFY_EMAIL
  • OPENAI_ENGINEERING_NOTIFY_EMAIL
• If a blog-specific recipient var is not set, Val Town emails the val owner by default.
• Val Town free-tier note: custom to / cc / bcc recipients are not allowed. On free tier, emails are sent to the val owner address (the code falls back automatically).

• SEED_SECOND_LATEST_ONCE=true: one-time test helper. On the first run, it stores each blog's second-latest post in blob and exits. On the next run, latest posts should trigger notifications.
• After testing, set this var to false or unset it.