ci(local-model): name the digest contract and ask for measured rows first

A row can pin its build only as `digest`, the value /api/tags reports
after the pull, and LocalModelEntrySchema must gain that optional field
before the weekly check can compare it. The script header and the docs
now say so, so the field cannot arrive under another name and be ignored.

Until it exists, the report's digest table names the build a Mac pulls
for each row and asks for the rows with measured figures first: their
memory figures describe one build, and without a digest a rebuild of
about the same size goes unnoticed. A switch between the mlx and the gguf
build is still caught by the size check (2% or more apart).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/check-local-model-catalog.test.ts

@@ -313,14 +313,22 @@ describe('exitCodeFor', () => {
 });
 
 describe('renderReport', () => {
-  it('says clean, and lists the digests to pin in full', () => {
+  it('says clean, and lists the digests to pin in full with the build a Mac pulls', () => {
     const report = renderReport(baseResult());
     expect(report).toMatch(/^# Local model catalogue: weekly check\n/);
     expect(report).toContain('**Clean**');
-    expect(report).toContain(`| \`a:b\` | \`${hex('b')}\` | \`${hex('a')}\` |`);
+    expect(report).toContain(`| \`a:b\` | mlx, safetensors | \`${hex('b')}\` | \`${hex('a')}\` |`);
+    expect(report).toContain('as the row field `digest`');
+    expect(report).not.toContain('Pin first');
     expect(report).toContain('## Not checked');
   });
 
+  it('asks to pin a row with measured figures first', () => {
+    const result = baseResult();
+    (result.models[0] as Record<string, unknown>).figures = 'measured';
+    expect(renderReport(result)).toContain('Pin first: `a:b`.');
+  });
+
   it('names a size drift with both figures and every build the tag offers', () => {
     const gguf = { bytes: 90, digest: hex('c'), runner: 'llamacpp', format: 'gguf' };
     const mac = { bytes: 7_639_229_431, digest: hex('a'), runner: 'mlx', format: 'safetensors' };
@@ -457,7 +465,7 @@ function buildRegistry() {
   };
 }
 
-const catalogOf = (models: { id: string; bytes: number; digest?: string }[]) => ({ updated: '2026-11-06', models });
+const catalogOf = (models: { id: string; bytes: number; digest?: string; figures?: string }[]) => ({ updated: '2026-11-06', models });
 const NOW = new Date('2026-11-09T06:00:00Z');
 
 describe('inspectModel', () => {
@@ -590,8 +598,8 @@ describe('runCheck', () => {
     const { fetchFn } = fakeFetch(registry.routes);
     const result = await runCheck({
       catalog: catalogOf([
-        { id: 'listed:1b', bytes: registry.sizes.mlx, digest: registry.digests.mlxChild },
-        { id: 'plain:2b', bytes: registry.sizes.plain },
+        { id: 'listed:1b', bytes: registry.sizes.mlx, digest: registry.digests.mlxChild, figures: 'measured' },
+        { id: 'plain:2b', bytes: registry.sizes.plain, figures: 'measured' },
       ]),
       pin: PIN,
       fetchFn,
@@ -601,8 +609,10 @@ describe('runCheck', () => {
     const report = renderReport(result);
     expect(report).toContain('**Clean**');
     // The pinned row is not offered for pinning again; the unpinned one is.
-    expect(report).not.toContain(`| \`listed:1b\` | \``);
-    expect(report).toContain(`| \`plain:2b\` | \`${registry.digests.plain}\``);
+    expect(report).not.toContain('| `listed:1b` | mlx');
+    expect(report).toContain(`| \`plain:2b\` | ggml, gguf | \`${registry.digests.plain}\``);
+    // Only the measured row that has no digest yet is asked for first.
+    expect(report).toContain('Pin first: `plain:2b`.');
   });
 
   it('a newer runtime release is drift', async () => {