docs(sdlc): address 23/09 review feedback

Trace every CR to a test case or delivered document, drop the draft FR/NFR remark column, record lessons learned, replace the three change reports with a change-control register, add high-level diagrams and wireframes to the design, plan verification rounds with dates and hours, and base the validation result on the Customer Requirements.

scripts/sdlc-seed/build.mjs

@@ -11,6 +11,7 @@ import * as other from './docs-other.mjs';
 
 const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../..');
 const target = path.join(root, 'sdlc');
+const figureSource = path.join(path.dirname(fileURLToPath(import.meta.url)), 'figures');
 
 // Folders that must exist even when a work product is evidence rather than a document.
 const FOLDERS = [
@@ -71,7 +72,16 @@ async function main() {
 
   await fs.rm(target, { recursive: true, force: true });
   for (const folder of FOLDERS) await fs.mkdir(path.join(target, folder), { recursive: true });
-  for (const d of docs) await fs.writeFile(path.join(target, d.dir, `${d.name}.md`), d.md, 'utf8');
+  for (const d of docs) {
+    await fs.writeFile(path.join(target, d.dir, `${d.name}.md`), d.md, 'utf8');
+    // Figures referenced as ![caption](figures/x.png) are copied next to the document.
+    for (const [, file] of d.md.matchAll(/^!\[[^\]]*\]\(figures\/([^)]+)\)$/gm)) {
+      const from = path.join(figureSource, file);
+      try { await fs.access(from); } catch { throw new Error(`${d.name} references missing figure ${file}; run scripts/sdlc-delivery/render-figures.mjs`); }
+      await fs.mkdir(path.join(target, d.dir, 'figures'), { recursive: true });
+      await fs.copyFile(from, path.join(target, d.dir, 'figures', file));
+    }
+  }
 
   const empty = [];
   for (const folder of FOLDERS) {