Move to escapement.warehack.ing; fix GFM tables in MDX

The landing page's headline results table was rendering as a paragraph of raw
pipe characters. Astro applies remark-gfm to .md but it wasn't reaching the MDX
pipeline, so every .md page rendered tables fine and only index.mdx was broken —
which is exactly why it went unnoticed. mdx({remarkPlugins:[remarkGfm]}) fixes it.

cuckoo.warehack.ing stays as a permanent redirect; it was live briefly.

dashboard/src/gpsntp_dashboard/static/index.html

@@ -174,7 +174,7 @@
       <!-- Anyone reading "PPS locked · ±219 ns" and wondering what that means,
            or why this box is a Pi and not an appliance, deserves one click to
            the write-up rather than a search. -->
-      <a class="foot-docs" href="https://cuckoo.warehack.ing" rel="noopener">
+      <a class="foot-docs" href="https://escapement.warehack.ing" rel="noopener">
         How this clock works
         <svg viewBox="0 0 16 16" aria-hidden="true"><path d="M4 8h7M8 5l3 3-3 3"/></svg>
       </a>

dashboard/src/gpsntp_dashboard/static/style.css

@@ -225,7 +225,7 @@ main { max-width: 1180px; margin: 0 auto; padding: 20px; display: grid; gap: 18p
  * Clockmakers signed the backplate — the brass face only a repairer sees once
  * the case is open. This footer is that plate: a double hairline for the plate
  * edge, engraved small-caps for the name, and nothing that moves. A signature
- * should be quiet. Same markup as the docs site at cuckoo.warehack.ing,
+ * should be quiet. Same markup as the docs site at escapement.warehack.ing,
  * recolored from brass to this dashboard's cyan.
  */
 .ss-plate__link {