wiki: save v1.4 release session note

Files the complete v1.1 to v1.4.1 release cycle as a session note in
wiki/meta/. Documents everything shipped, all key lessons (plugin install
syntax, allowed-tools frontmatter, Bases vs Dataview, PostCompact hook
necessity, git filter-repo two-pass scrub), and the current plugin state.

Updated:
- wiki/meta/claude-obsidian-v1.4-release-session.md (NEW)
- wiki/log.md (new entry at top)
- wiki/hot.md (refreshed with current session context)
- wiki/overview.md (page count 25 to 26)
- wiki/index.md (page count 25 to 26)

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

wiki/index.md

@@ -23,7 +23,7 @@ related:
 
 # Wiki Index
 
-Last updated: 2026-04-08 | Total pages: 25 | Sources ingested: 2
+Last updated: 2026-04-08 | Total pages: 26 | Sources ingested: 2
 
 Navigation: [[overview]] | [[log]] | [[hot]] | [[dashboard]] | [[Wiki Map]] | [[getting-started]]