docs: add CLAUDE.md pointer to QQQ knowledge-base dossier + hub

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CLAUDE.md

@@ -0,0 +1,13 @@
+# qqq-android
+
+## Knowledge base
+
+Deep-review dossiers for this repo live in the second-brain vault
+(`$SECOND_BRAIN_VAULT`, R:/Git.Local/KofTwentyTwo/second-brain):
+
+- Hub / platform map: `knowledge/qqq/qqq-hub.md`
+- This repo's dossier: `knowledge/qqq/repos/qqq-android.md`
+  (reviewed at commit `4f36aabc1abe` on branch `main`, 2026-07-04)
+
+Read the dossier before substantive work here instead of re-deriving the
+architecture from source.