docs(P48): vision gaps + badge system + substrate→engine + CR format + agentic tags

9 requirements implemented across presentation decks and project docs:

1. DX closing slide: added 'Infrastructure as a utility, not a craft' bullet
   to convey the full vision (infrastructure consumed, not maintained;
   platform compounds value over time).
2. PW Problem slide: 'moving a merged change' → 'promoting a change'.
3. PW Problem slide: added 'Red tape' and 'Scalability without increasing
   headcount' bullets (4 frictions, not 2).
4. PW Roadmap slide: redesigned with side-by-side HTML table layout
   (Testing | Planned), 16px font, no overflow.
5. PW deck: added new slide 'What This Platform Is — and Isn't' after North
   Star (sovereign boundary, infrastructure as utility, 4 anti-goals).
   PW deck now 16 slides (was 15).
6. Maturity nomenclature: 'Available today'/'shipped' → 'Testing' across
   both decks + source markdown. New .testing badge (blue/teal #DBEAFE).
   Roadmap title: 'Testing vs. Planned'. The platform has 0 consumer
   adoption — 'shipped' was inaccurate.
7. Global: 'substrate' → 'engine' across entire project (88 matches, 30+
   files including .ciagent/, docs/, modules/, adapters/, schemas/, code).
8. Presentation files only: 'forge' → 'VCS' / 'version control system'
   (6 occurrences in 4 files). 'forge' retained in all technical docs and
   code as the industry-standard term.
9. New .agentic badge (purple/violet #EDE9FE) appended to agentic features
   in both decks: confidence signal, autonomous dev, pattern recognition,
   dynamic module creation, citizen developer surface, auto-promotion.

Also: Change Request ID format changed from 'CR-2026-001' to 'CHG0678912'
across presentation files, consumer guide, and test fixtures.

HTML re-rendered. PPTX rendered for release upload.

---ci---
phase: 48
milestone: v1.9
status: complete
requirements:
  covered: []
  partial: []
---/ci---

docs/index.md

@@ -32,7 +32,7 @@ There are two kinds of repository in the ACDL model:
 | [Pipeline](pipeline/) | Consumers + platform engineers | The central CI + deployment pipeline and its stages. |
 | [Versioning](pipeline/versioning) | Consumers + platform engineers | Module versioning + deploy-pipeline versioning (the `uses:` tag). |
 | [Environments](environments/) | Consumers | Platform-managed environments and the first-run onboarding flow. |
-| [Architecture](architecture) | Platform engineers | The current architecture — layers, cross-cutting concerns, the substrate abstraction. |
+| [Architecture](architecture) | Platform engineers | The current architecture — layers, cross-cutting concerns, the engine abstraction. |
 | [Vision](vision) | All | The why — the friction the platform absorbs and the north star. |
 
 ## Features
@@ -64,7 +64,7 @@ Planned future features (no dates; tracked in the internal roadmap):
   mechanism, redesigned).
 - **Compliance milestone** — per-module compliance extension points (GDPR,
   SOX, SOC2, DORA) wired into the pipeline.
-- **Additional substrate adapters** — beyond the Terraform adapter.
+- **Additional engine adapters** — beyond the Terraform adapter.
 - **Environment self-service** — a consumer-facing flow to request and
   provision a new platform-managed environment.
 - **HITL gates for qa / prod / dr** — human attestation + higher confidence