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>

build.gradle.kts

@@ -11,7 +11,7 @@ plugins {
 group = "de.hoennig"
 // bump at least the patch version for every deployment, so the UI footer
 // (BuildProperties) and --version identify what is actually running
-version = "0.9.7"
+version = "0.9.8"
 
 java {
     toolchain {