Link index-less report pages from the artifact index (v0.9.8)

Gradle's --profile report is archived but was unreachable: report discovery
only looked for index.html, while the profile page carries a timestamped
file name. Scan reports/ and its direct sub-directories for HTML pages that
no index covers, so a report tree cannot flood the index with inner pages.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/main/resources/templates/releases.html

@@ -7,6 +7,12 @@
     <div th:replace="~{fragments :: nav(${view})}"></div>
     <div class="panel release-notes">
 
+        <h2>v0.9.8 <span class="muted">— 2026-08-10</span></h2>
+        <ul>
+            <li>The artifact index also links report pages of directories without an <code>index.html</code>,
+                such as Gradle's <code>--profile</code> report with its timestamped file name.</li>
+        </ul>
+
         <h2>v0.9.7 <span class="muted">— 2026-08-10</span></h2>
         <ul>
             <li><code>init --systemd</code> also installs a nightly Docker cleanup timer