Remove automaton task management framework

- Delete .automaton/ directory and all tracked files
- Remove git hooks (pre-commit, pre-push)
- Delete ADR-0002 (automaton as issue tracker)
- Remove automaton references from AGENTS.md, HANDOFF.md, TASK_COMPLETION_SUMMARY.md, docs
- Update .gitignore to remove automaton entries
- Unregister from ~/.automaton/projects.json

HANDOFF.md

@@ -7,8 +7,7 @@ This file previously held a 2026-06-30 multi-agent orchestrator snapshot. That s
 1. **`docs/FUNCTIONAL_DESIGN.md`** — what is Live / Backend-ready / UI-local / Stub / Missing  
 2. **`docs/TECH_DESIGN.md`** — stack, tRPC map, engines, schema debt, test counts  
 3. **`CONTEXT.md`** — domain glossary (not status)  
-4. **Obsidian** `investor-flow.md` — session orientation wiki  
-5. **`.automaton/tasks/`** — active gap tasks (implement pool after audit)
+4. **Obsidian** `investor-flow.md` — session orientation wiki
 
 ## Active gap tasks (created 2026-07-18)