docs: add Falah Cast Al-Razi episode playbook

Episode 1 of the 5-episode finale arc, published to Ghost with clean
single-attempt publish (HTTP 201, no duplicate slug).

falahcast-al-razi-published.md

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+# Falah Cast — Al-Razi: The Skeptic Physician — Published
+
+**Title:** Al-Razi: The Skeptic Physician
+**Live:** https://iqra.falahos.my/al-razi-the-skeptic-physician/
+
+## Episode summary
+First episode of the new 5-episode finale arc (Week 4-6 of the plan logged in the
+Aquinas doc). Bridges from Al-Kindi's closing tease of Abu Bakr al-Razi ("Rhazes") as a
+sharper, more skeptical, rationalist contrast figure. Covers his medical achievements —
+the first clinical description distinguishing smallpox from measles (Kitab al-Jadari wa
+al-Hasbah) and his empirical hospital-siting method in Baghdad (hanging meat across
+neighborhoods to judge air quality) — alongside his genuinely controversial philosophical
+positions on prophecy and religious authority. Presents the controversy honestly, without
+softening it or editorializing against the tradition: Al-Razi gave reason unusually high
+authority and questioned whether prophecy was necessary given human intellect, which drew
+fierce criticism from later scholars. Framed as honest intellectual history rather than a
+simple hero/villain narrative.
+
+## Pipeline (unchanged, proven again)
+Notion AI (Content Studio custom agent) generated the script -> edge-tts
+(en-US-AriaNeural) rendered the audio -> Ghost Admin API uploaded the media and published
+the post. Clean single-attempt publish, HTTP 201, no duplicate slug
+(al-razi-the-skeptic-physician).
+
+## Bridges to next
+Closes by stepping away from the Arab-centered philosophical mainstream, back to the
+Malay world — the next episode covers Hamzah Fansuri, the great Malay Sufi poet of
+Aceh, returning to the Nusantara/Malay thread last touched in the Hang Tuah/Sejarah
+Melayu episodes earlier in the series.
+
+## Arc note
+This is episode 1 of 5 in the finale arc: Al-Razi -> Hamzah Fansuri -> Nuruddin
+al-Raniri -> Mulla Sadra -> Muhammad Iqbal. Completing this arc closes the full
+originally-planned 6-week arc that began with Thomas Aquinas.