wiki: add SELinux vmail and gitea-runner articles; update indexes

- New: SELinux Fixing Dovecot Mail Spool Context (/var/vmail)
  Corrected fix — mail_spool_t only, no dovecot_tmp_t on tmp/ dirs.
  Includes warning and recovery steps for the Postfix delivery outage.
- New: Gitea Actions Runner Boot Race Condition Fix
  network-online.target dependency, RestartSec=10, /etc/hosts workaround.
- Updated SUMMARY.md, index.md, README.md, 05-troubleshooting/index.md
- Article count: 37 → 39; MajorWiki-Deploy-Status updated

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -3,7 +3,7 @@
 > A growing reference of Linux, self-hosting, open source, streaming, and troubleshooting guides. Written by MajorLinux. Used by MajorTwin.
 >
 **Last updated:** 2026-03-14
-**Article count:** 37
+**Article count:** 39
 
 ## Domains
 
@@ -13,7 +13,7 @@
 | 🏠 Self-Hosting & Homelab | `02-selfhosting/` | 8 |
 | 🔓 Open Source Tools | `03-opensource/` | 9 |
 | 🎙️ Streaming & Podcasting | `04-streaming/` | 1 |
-| 🔧 General Troubleshooting | `05-troubleshooting/` | 10 |
+| 🔧 General Troubleshooting | `05-troubleshooting/` | 12 |
 
 ---
 
@@ -109,6 +109,8 @@
 - [yt-dlp YouTube JS Challenge Fix on Fedora](05-troubleshooting/yt-dlp-fedora-js-challenge.md) — fixing YouTube JS challenge solver errors and missing formats on Fedora
 - [Gemini CLI Manual Update](05-troubleshooting/gemini-cli-manual-update.md) — how to manually update the Gemini CLI when automatic updates fail
 - [MajorWiki Setup & Pipeline](05-troubleshooting/majwiki-setup-and-pipeline.md) — setting up MajorWiki and the Obsidian → Gitea → MkDocs publishing pipeline
+- [Gitea Actions Runner: Boot Race Condition Fix](05-troubleshooting/gitea-runner-boot-race-network-target.md) — fixing act_runner crash loop on boot caused by DNS not ready at startup
+- [SELinux: Fixing Dovecot Mail Spool Context (/var/vmail)](05-troubleshooting/selinux-dovecot-vmail-context.md) — fixing thousands of AVC denials when /var/vmail has wrong SELinux context
 
 ---
 
@@ -116,6 +118,8 @@
 
 | Date | Article | Domain |
 |---|---|---|
+| 2026-03-14 | [SELinux: Fixing Dovecot Mail Spool Context (/var/vmail)](05-troubleshooting/selinux-dovecot-vmail-context.md) | Troubleshooting |
+| 2026-03-14 | [Gitea Actions Runner: Boot Race Condition Fix](05-troubleshooting/gitea-runner-boot-race-network-target.md) | Troubleshooting |
 | 2026-03-14 | [Mail Client Stops Receiving: Fail2ban IMAP Self-Ban](05-troubleshooting/networking/fail2ban-imap-self-ban-mail-client.md) | Troubleshooting |
 | 2026-03-14 | [SearXNG: Private Self-Hosted Search](03-opensource/alternatives/searxng.md) | Open Source |
 | 2026-03-14 | [FreshRSS: Self-Hosted RSS Reader](03-opensource/alternatives/freshrss.md) | Open Source |