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>

05-troubleshooting/systemd/session-scope-failure-at-login.md

@@ -1,3 +1,12 @@
+---
+title: "Systemd Session Scope Fails at Login (session-cN.scope)"
+domain: troubleshooting
+category: systemd
+tags: [systemd, ssh, login, session, linux]
+status: published
+created: 2026-04-02
+updated: 2026-04-02
+---
 # Systemd Session Scope Fails at Login (`session-cN.scope`)
 
 After SSH login, systemd reports a failed transient unit like `session-c1.scope`. The MOTD or login banner shows `Failed Units: 1 — session-c1.scope`. This is a harmless race condition, not a real service failure.
@@ -90,4 +99,4 @@ Should report 0 failed units.
 
 ## Related
 
-- [[gitea-runner-boot-race-network-target]] — Another systemd race condition involving service startup ordering
+- [gitea-runner-boot-race-network-target](../gitea-runner-boot-race-network-target.md) — Another systemd race condition involving service startup ordering