docs(P44): leadership presentation decks + Marp synthesis + README

Add two leadership-facing presentation decks for senior leadership
(CTO, Head of Cloud, Head of Infrastructure, Head of DevOps):

1. How the Platform Works — 14 slides covering the contract-driven model,
   zero-trust, computed safety, policy enforcement, secure-by-default,
   immutable audit, HITL, observability, platform-managed environments,
   portability, and an honest shipped-vs-planned roadmap.
2. The Developer Experience — 14 slides covering two consumer surfaces,
   the 5-line contract, no platform code, versioned releases, instant
   feedback, deploy outputs, local reproducibility, friendly onboarding,
   safe promotion (one contract + per-env CI jobs), safe decommission,
   self-service module catalog, and the leadership outcome.

Each deck has two forms:
- Full markdown (source of truth) with speaker notes + mermaid code blocks
- Marp deck (lean, no speaker notes, embedded PNG diagrams) for presentation

Includes a README documenting the 3-step slide creation process:
(full markdown → Marp synthesis → PPTX export) with conventions, build
commands, and maturity framing rules.

---ci---
phase: 44
milestone: v1.9
status: complete
requirements:
  covered: []
  partial: []
---/ci---

docs/presentations/assets/mmd/developer-experience-01-two-surfaces.mmd

@@ -0,0 +1,7 @@
+flowchart LR
+    A["Technical developer"] --> C["Contract YAML"]
+    B["Citizen developer<br/>(non-technical)"] --> D["Declares intent<br/>in natural language"]
+    D --> E["Agent produces<br/>the contract"]
+    C --> F["Same platform:<br/>resolve → check → plan →<br/>policy → confidence → apply"]
+    E --> F
+    F --> G["Same safety guarantees,<br/>same audit trail"]

docs/presentations/assets/mmd/developer-experience-02-what-dev-does.mmd

@@ -0,0 +1,5 @@
+flowchart LR
+    A["1. App code<br/>(top level of the repo)"] --> D["Push to main"]
+    B["2. Contract<br/>(.acdl/contract.yaml)"] --> D
+    C["3. CI definition<br/>(.github/workflows/deploy.yml<br/>— one 'uses:' line)"] --> D
+    D --> E["Platform does the rest"]

docs/presentations/assets/mmd/developer-experience-03-no-cloning.mmd

@@ -0,0 +1,6 @@
+flowchart LR
+    A["Consumer repo<br/>app + contract + 'uses:'"] -->|triggers on push to main| B["Platform runner"]
+    B -->|checks out the consumer repo| A
+    B -->|checks out the ACDL platform repo<br/>into the workspace| C["Platform code<br/>(modules, adapters, schemas)"]
+    C --> B
+    B -->|runs the pipeline against<br/>the consumer's contract| D["Consumer's resources in AWS"]

docs/presentations/assets/mmd/platform-works-01-contract-driven.mmd

@@ -0,0 +1,3 @@
+flowchart LR
+    A["Consumer<br/>writes a contract"] --> B["Platform resolves,<br/>compiles, checks,<br/>deploys, records"]
+    B --> C["Resources running in AWS<br/>+ tamper-evident evidence"]

docs/presentations/assets/mmd/platform-works-02-end-to-end-flow.mmd

@@ -0,0 +1,10 @@
+flowchart TD
+    subgraph R1 [" "]
+        direction LR
+        A["Consumer<br/>contract"] --> B["Validate<br/>contract"] --> C["Resolve to<br/>target stack"] --> D["Security<br/>checks"] --> E["Infrastructure<br/>plan"]
+    end
+    subgraph R2 [" "]
+        direction LR
+        F["Policy<br/>checks"] --> G["Confidence<br/>signal"] --> H["Evidence<br/>event"] --> I["Infrastructure<br/>apply"]
+    end
+    E --> F

docs/presentations/assets/puppeteer-config.json

@@ -0,0 +1 @@
+{ "args": ["--no-sandbox", "--disable-setuid-sandbox"] }