feat: show measurements on the site

Each emulator with records gets a Tested block: claim, result, method, computer, core build and the permalink of its record at the pin. A Measurements page filters every test in the browser from the compact index, and the Data page lists measurements.sqlite with its tables. One SQLite file per emulator is linked from its page. wiki/measurements.md says how a test runs, held to the Start here budgets.

Both workflows fetch the pinned commit alone with git before the build, and the deploy fails without it.

.github/workflows/deploy-site.yml

@@ -30,6 +30,7 @@ on:
       - "scripts/largefiles.py"
       - "scripts/launchers.py"
       - "scripts/manifestselect.py"
+      - "scripts/measurement_records.py"
       - "scripts/nativemode.py"
       - "scripts/packextras.py"
       - "scripts/packpaths.py"
@@ -46,6 +47,7 @@ on:
       - "scripts/sitediagrams.py"
       - "scripts/siteguides.py"
       - "scripts/sitemarkup.py"
+      - "scripts/sitemeasurements.py"
       - "scripts/siteexports.py"
       - "scripts/siterender.py"
       - "scripts/sitesources.py"
@@ -55,6 +57,7 @@ on:
       - "scripts/slots.py"
       - "scripts/sourceref.py"
       - "scripts/split_pack.py"
+      - "scripts/sync_measurements.py"
       - "scripts/truth.py"
       - "scripts/upstream.py"
       - "scripts/validate_schemas.py"
@@ -69,6 +72,7 @@ on:
       - "database.json"
       - "release.json"
       - "derivable.json"
+      - "measurements-pin.json"
       # The Starlight project: config, components, styles, lockfile. Its
       # generated folders are gitignored and never trigger anything.
       - "website/**"
@@ -114,6 +118,18 @@ jobs:
 
       - run: npm ci --prefix website
 
+      # The core probe records live in Abdess/retrobios-measurements, read
+      # at the commit measurements-pin.json names and never at its head: a
+      # record reaches the site when the pin moves. One shallow fetch of that
+      # commit, with git alone.
+      - name: Clone the measurements at their pin
+        run: |
+          repo=$(python -c "import json; print(json.load(open('measurements-pin.json'))['repo'])")
+          commit=$(python -c "import json; print(json.load(open('measurements-pin.json'))['commit'])")
+          git init -q .cache/measurements
+          git -C .cache/measurements fetch -q --depth 1 "$repo" "$commit"
+          git -C .cache/measurements checkout -q --detach "$commit"
+
       - name: Validate data contracts
         run: python scripts/validate_schemas.py
 
@@ -133,7 +149,7 @@ jobs:
 
       - name: Generate site
         run: |
-          python scripts/generate_site.py
+          python scripts/generate_site.py --require-measurements
           python scripts/generate_readme.py --db database.json --platforms-dir platforms
           # starlight-links-validator fails the build on a dead link or anchor.
           npm run build --prefix website