Wiki/grafo: graphify + wiki-brain setup compartilhado pra equipe

CLAUDE.md com 3 secoes (navegacao, regras de sessao, doc pra equipe).
Vault Obsidian/Brain/ commitado pra time editar conhecimento curado.
graphify-out/ no gitignore (regeneravel via /graphify src/).
Binarios do Obsidian.exe ignorados, so vault Brain/ vai pro repo.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Obsidian/Brain/log.md

@@ -0,0 +1,15 @@
+# Wiki Log
+
+Chronological, append-only record of everything that's happened in this wiki.
+
+**Format:**
+```
+## [YYYY-MM-DD HH:MM] <type> | <title>
+<optional detail line>
+```
+
+**Types:** `session`, `ingest`, `query`, `lint`, `rebuild`
+
+**Quick access:** `grep "^## \[" log.md | tail -5` gives you the last 5 entries.
+
+---