fix: one id per card, and render the site locally

A copy filed under two consoles of one maker was listed twice with the same id, and a data directory listed the same bytes twice, so the site deploy refused 20 pages. The first card keeps the id. The pipeline only generated the pages, so it now renders them with mkdocs build --strict and runs validate_site as the deploy does. The resumed-speed test read the clock and failed on a slow runner, it now fixes the elapsed time.

scripts/pipeline.py

@@ -24,6 +24,7 @@ Steps, numbered as the run prints them:
   6    --verify-packs               pack integrity, extraction and hashes
   7    generate_readme.py           README.md and CONTRIBUTING.md
   8    generate_site.py             MkDocs pages
+  8b   mkdocs build --strict        rendered as the site deploy renders it, then validate_site.py
 
 --offline skips 2 to 2b2 and the network side of 2e and 4: release assets
 come from .cache/large/ only.
@@ -43,6 +44,7 @@ import contextlib
 import importlib.util
 import os
 import re
+import shutil
 import subprocess
 import sys
 import time
@@ -801,6 +803,21 @@ def main() -> None:
         print("\n--- 8/8 generate site: SKIPPED (--skip-docs) ---")
         results["generate_site"] = SKIPPED
 
+    # Step 8b: the render the site deploy runs. Generating the pages without
+    # rendering them let 20 pages with duplicate ids through to CI.
+    if args.skip_docs:
+        print("\n--- 8b render site: SKIPPED (--skip-docs) ---")
+        results["render_site"] = SKIPPED
+    elif shutil.which("mkdocs") is None:
+        print("\n--- 8b render site: SKIPPED (mkdocs not installed) ---")
+        results["render_site"] = SKIPPED
+    else:
+        ok, _ = run(["mkdocs", "build", "--strict"], "8b render site")
+        if ok:
+            ok, _ = run([sys.executable, "scripts/validate_site.py"], "8b validate site")
+        results["render_site"] = ok
+        all_ok = all_ok and ok
+
     # Summary
     total_elapsed = time.monotonic() - total_start
     print(f"\n{'=' * 60}")