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.*  
 

ses/pulse_dev.md

@@ -4,14 +4,11 @@ categories:
   - Songwriting notes
 wiki:
   publish: true
-  siblings:
-    - path: pulse.md
-      tag: PULSE_SONG
 ---
 
 # pulse under latent semantic envelopes: personal dev notes
 
-The remaining bits of how I came to all this. For the actual song page, see PULSE_SONG.  
+The remaining bits of how I came to all this. For the actual song page, see [pulse under latent semantic envelopes](pulse.md).  
 
 ## Planning area
 

ses/tunnels.md

@@ -3,7 +3,6 @@ title: Tunnels
 album: Shirakaba Express Service
 wiki:
   publish: true
-  siblings: 
 release_date: 2026-03-01
 lrc: tunnels.lrc
 ---