Record Workshop versions in Drone changelogs and retire local sending

tools/discord_changelog_ci.py

@@ -45,7 +45,15 @@ def latest_changes(before, after):
     latest = new[0]
     if old and (latest == old[0] or latest[0] in [title for title, _ in old[1:]]):
         return None  # Unchanged newest entry, or removal/reordering of old entries.
-    message = '**' + latest[0] + '**\n\n' + latest[1]
+    version_note = ''
+    preamble = after.split('\n## ', 1)[0]
+    versions = re.findall(r'^Latest published Workshop version: \*\*(\d+\.\d+\.\d+)\*\*\r?$',
+                          preamble, re.MULTILINE)
+    if 'Latest published Workshop version:' in preamble:
+        if len(versions) != 1 or any(int(part) > 32000 for part in versions[0].split('.')):
+            raise ChangelogError('Invalid Workshop version record in CHANGELOG.md.')
+        version_note = 'Last published Workshop version: **' + versions[0] + '**\n\n'
+    message = '**' + latest[0] + '**\n\n' + version_note + latest[1]
     if len(message.encode('utf-16-le')) // 2 > 2000:
         raise ChangelogError('Newest changelog entry exceeds Discord’s 2000-character limit.')
     return message