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>

02-selfhosting/security/selinux-fail2ban-execmem-fix.md

@@ -1,3 +1,12 @@
+---
+title: "SELinux: Fixing Fail2ban grep execmem Denial on Fedora"
+domain: selfhosting
+category: security
+tags: [selinux, fail2ban, fedora, execmem, security]
+status: published
+created: 2026-04-02
+updated: 2026-04-02
+---
 # SELinux: Fixing Fail2ban grep execmem Denial on Fedora
 
 ## The Problem
@@ -82,5 +91,5 @@ Writing the `.te` file manually is more reliable and self-documenting.
 
 ## See Also
 
-- [Docker & Caddy Recovery After Reboot (Fedora + SELinux)](../../../05-troubleshooting/docker-caddy-selinux-post-reboot-recovery.md) — another SELinux fix for post-reboot service issues
-- [SELinux: Fixing Dovecot Mail Spool Context](../../../05-troubleshooting/selinux-dovecot-vmail-context.md) — custom SELinux context for mail spool
+- [Docker & Caddy Recovery After Reboot (Fedora + SELinux)](../../05-troubleshooting/docker-caddy-selinux-post-reboot-recovery.md) — another SELinux fix for post-reboot service issues
+- [SELinux: Fixing Dovecot Mail Spool Context](../../05-troubleshooting/selinux-dovecot-vmail-context.md) — custom SELinux context for mail spool