docs(P47): presentation slide updates + HIPAA removal from all docs

Presentation changes (both Marp decks + source markdown):
1. Title slide: deck title as H1 (slightly bigger), 'Agentic Cloud Delivery
   Platform' as H3 subtitle — cleaner title hierarchy
2. DX deck: removed Local Reproducibility slide (not beneficial for DX)
3. DX deck: Safe Promotion Path slide redesigned with side-by-side layout
   for Approaches A and B (HTML table, two columns)
4. DX deck: 'an agent' → 'an AI agent' (slide 2 + Citizen Developer slide)
5. DX deck: What a Developer Does — diagram floated to the right side
6. Header simplified to just the deck name (subtitle now on title slide)

HIPAA removal (25 files):
- Completely removed all HIPAA references from all markdown documentation,
  presentation source files, module READMEs, and rendered HTML
- Removed HIPAA from compliance milestone lists (GDPR, SOX, SOC2, DORA remain)
- Removed HIPAA section references (§164.xxx) from compliance annotations
- Cleaned up empty parentheses and broken commas left by removal
- Re-rendered both HTML decks from updated Marp source

---ci---
phase: 47
milestone: v1.9
status: complete
requirements:
  covered: []
  partial: []
---/ci---

docs/index.md

@@ -63,7 +63,7 @@ Planned future features (no dates; tracked in the internal roadmap):
   consumer creates a module directly from the contract file (the "composition"
   mechanism, redesigned).
 - **Compliance milestone** — per-module compliance extension points (GDPR,
-  SOX, SOC2, HIPAA, DORA) wired into the pipeline.
+  SOX, SOC2, DORA) wired into the pipeline.
 - **Additional substrate adapters** — beyond the Terraform adapter.
 - **Environment self-service** — a consumer-facing flow to request and
   provision a new platform-managed environment.