Two-stage pipeline: immediate raw capture, once-daily compile

Needed an unattended pipeline that turns forwarded newsletters into a “daily magazine issue” rather than a live-updating feed. Decided: the intake webhook does nothing but commit each raw email to the repo the moment it arrives; a separate scheduled GitHub Action runs once a day, cleaning/summarizing/categorizing everything received since the last run via the Anthropic API, and publishes it as one dated Issue. Chosen over processing each email fully as it arrives, because the magazine framing implies a complete, discrete edition per day — and because it batches the expensive AI calls and keeps raw capture cheap and immediate, so nothing is lost even if the daily compile step fails.