chore: bootstrap project structure (.tasks, .wiki, CLAUDE.md)

Adds canonical Karpathy LLM Wiki layout, .tasks/STATUS.md board,
and CLAUDE.md trigger set. Brings factory repo into projects-meta
indexing eligibility (sync-runner.ts:69 — needs .tasks/STATUS.md or
.wiki/index.md on default branch).

Bootstrap-manifest at .wiki/concepts/bootstrap-manifest.md records
skill versions used (project-bootstrap@1.7.0, layouts inline-fallback
from setup-wiki@1.0.0 / setup-tasks@1.0.0).

.wiki/log.md

@@ -0,0 +1,15 @@
+# Wiki Log
+
+Append-only operation log. One entry per operation. Format:
+
+```
+## [YYYY-MM-DD] <op> | <one-line description>
+```
+
+Operations: `init`, `ingest`, `query`, `lint`, `refactor`, `decision`.
+
+Parseable: `grep "^## \[" .wiki/log.md | tail -20`.
+
+---
+
+## [2026-05-06] init | bootstrap empty wiki via project-bootstrap