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/overview.md

@@ -49,8 +49,8 @@ Run `/wiki` to scaffold this vault for your own domain and replace this overview
 ## Current State
 
 - Sources ingested: 2
-- Wiki pages: 25
-- Last activity: 2026-04-08 (ecosystem research ingest — 16+ projects mapped)
+- Wiki pages: 26
+- Last activity: 2026-04-08 (v1.4.1 shipped, release session filed)
 
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