Nominate related pages with Markdown links, not siblings macros

Drops the `wiki.siblings` frontmatter block from all eight files that carried
one — six of them declared it empty — and replaces the two live `ALL_CAPS`
placeholders with ordinary relative Markdown links:

  see PULSE_DEV.  ->  see [Dev gibberish](pulse_dev.md).

Both now resolve to real wikilinks at publish time, and both read as links in
Gitea's blob view instead of as a naked token in the middle of a sentence.

Requires the matching renderer change in novoyuuparosk-auto-wiki; the macro
substitution it depended on no longer exists.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

ses/pulse.md

@@ -3,10 +3,6 @@ title: pulse under latent semantic envelopes
 album: Shirakaba Express Service
 wiki:
   publish: true
-  siblings: 
-    - path: pulse_dev.md
-      tag: PULSE_DEV
-      label: Dev gibberish
 release_date: 2026-06-18
 lrc: pulse.lrc
 ---
@@ -14,7 +10,7 @@ lrc: pulse.lrc
 # pulse under latent semantic envelopes
 
 The name of the song is stylised in all-lowercase, `pulse under latent semantic envelopes`, but Mediawiki loves a Capital letter.   
-For more behind-the-scene shenanigans, see PULSE_DEV.  
+For more behind-the-scene shenanigans, see [Dev gibberish](pulse_dev.md).  
 
 *This page is proudly the first to be maintained by Gitea actions.*