Forum import: archived comments posted under their original author names

One account per original author (nickname = name as signed on the old
site, group 'Original site'), display-name driver 'museum' keeps the
brackets; --replace re-imports threads without real replies.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/museum/apple-ii.md

@@ -67,7 +67,7 @@ params:
   - docs
   - videos
   - comments
-  forum_thread: 1
+  forum_thread: 7
   photos:
   - title: INSIDE AN APPLE II
     subtitle: ''

content/museum/commodore-c64.md

@@ -72,7 +72,7 @@ params:
   - docs
   - videos
   - comments
-  forum_thread: 2
+  forum_thread: 8
   photos:
   - title: COMMODORE 64
     subtitle: ''

content/museum/kaypro-pc-286i.md

@@ -67,7 +67,7 @@ params:
   tabs:
   - photos
   - comments
-  forum_thread: 5
+  forum_thread: 11
   photos:
   - title: COMPLETE SYSTEM
     subtitle: ''

content/museum/magnavox-odyssey-100.md

@@ -54,7 +54,7 @@ params:
   - links
   - docs
   - comments
-  forum_thread: 6
+  forum_thread: 12
   photos:
   - title: ODYSSEY 100
     subtitle: ''

content/museum/magnavox-odyssey.md

@@ -52,7 +52,7 @@ params:
   - links
   - videos
   - comments
-  forum_thread: 4
+  forum_thread: 10
   photos:
   - title: MAIN UNIT
     subtitle: ''

content/museum/nec-pc-6601.md

@@ -69,7 +69,7 @@ params:
   - adverts
   - links
   - comments
-  forum_thread: 3
+  forum_thread: 9
   photos:
   - title: PC-6601
     subtitle: ''