feat: replace ASCII art diagrams with SVG

- README: SpeckDL pipeline and architecture diagrams
- docs/strategy.md: Plan D→C→A→B flow diagram
- docs/consulting-packages.md: consulting pipeline flow diagram
- New: docs/diagrams/ with 4 static SVGs (dark-mode compatible, responsive viewBox)

README.md

@@ -27,35 +27,13 @@ speck RetryHandler {
 
 SpeckDL compiles through a deterministic pipeline:
 
-```
-SpeckDL ──► Z3 (SMT solver) ──► DST (decision structures) ──► WASM
-   │              │                        │                      │
-   │         verify constraints      compile to decision    deploy verified
-   │         catch contradictions    trees                  artifacts
-   │
-   └── Provenance graph grows automatically at each stage
-```
+![SpeckDL compilation pipeline](docs/diagrams/speckdl-pipeline.svg)
 
 No LLMs in the compilation path. No non-determinism. Same input, same output — every time.
 
 ## Architecture
 
-```
-┌─────────────────────────────────────────────────┐
-│                  Orchestrator                    │
-│         Accepts Specks, decomposes tasks         │
-└───────────┬─────────────────┬───────────────────┘
-            │                 │
-    ┌───────▼───────┐ ┌───────▼───────┐
-    │  Team Lead    │ │  Team Lead    │
-    │  Verification │ │  Codegen      │
-    └───────┬───────┘ └───────┬───────┘
-            │                 │
-    ┌───────▼───────┐ ┌───────▼───────┐
-    │  Z3 SME       │ │  TypeScript   │
-    │  (verify)      │ │  SME (emit)   │
-    └───────────────┘ └───────────────┘
-```
+![Architecture diagram](docs/diagrams/architecture.svg)
 
 - **Orchestrator** — client entry point, task decomposition
 - **Team Leads** — manage specialized agents, elastic scaling