wiki: audit fixes — broken links, wikilinks, frontmatter, stale content (66 files)

- Fixed 4 broken markdown links (bad relative paths in See Also sections)
- Corrected n8n port binding to 127.0.0.1:5678 (matches actual deployment)
- Updated SnapRAID article with actual majorhome paths (/majorRAID, disk1-3)
- Converted 67 Obsidian wikilinks to relative markdown links or plain text
- Added YAML frontmatter to 35 articles missing it entirely
- Completed frontmatter on 8 articles with missing fields

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

03-opensource/dev-tools/rsync.md

@@ -1,3 +1,12 @@
+---
+title: "rsync — Fast, Resumable File Transfers"
+domain: opensource
+category: dev-tools
+tags: [rsync, backup, file-transfer, linux, cli]
+status: published
+created: 2026-04-02
+updated: 2026-04-02
+---
 # rsync — Fast, Resumable File Transfers
 
 ## Problem

03-opensource/dev-tools/screen.md

@@ -1,3 +1,12 @@
+---
+title: "screen — Simple Persistent Terminal Sessions"
+domain: opensource
+category: dev-tools
+tags: [screen, terminal, ssh, linux, cli]
+status: published
+created: 2026-04-02
+updated: 2026-04-02
+---
 # screen — Simple Persistent Terminal Sessions
 
 ## Problem

03-opensource/dev-tools/tmux.md

@@ -1,3 +1,12 @@
+---
+title: "tmux — Persistent Terminal Sessions"
+domain: opensource
+category: dev-tools
+tags: [tmux, terminal, ssh, multiplexer, linux]
+status: published
+created: 2026-04-02
+updated: 2026-04-02
+---
 # tmux — Persistent Terminal Sessions
 
 ## Problem

03-opensource/dev-tools/ventoy.md

@@ -78,4 +78,4 @@ sudo ./Ventoy2Disk.sh -u /dev/sdX
 
 ## See Also
 
-- [[linux-distro-guide-beginners]]
+- [linux-distro-guide-beginners](../../01-linux/distro-specific/linux-distro-guide-beginners.md)