refactor: rename factory/ → supervisor/, factory-poll → supervisor-poll

The supervisor agent was confusingly named "factory" (same as the
project). Rename directory, script, log, lock, status, and escalation
files. Update all references across scripts and docs.

FACTORY_ROOT env var unchanged (refers to project root, not agent).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

supervisor/best-practices/memory.md

@@ -0,0 +1,29 @@
+# Memory Best Practices
+
+## Environment
+- VPS: 8GB RAM, 4GB swap, Debian
+- Running: Docker stack (8 containers), Woodpecker CI, OpenClaw gateway
+
+## Safe Fixes (no permission needed)
+- Kill stale `claude` processes (>3h old): `pgrep -f "claude" --older 10800 | xargs kill`
+- Drop filesystem caches: `sync && echo 3 | sudo tee /proc/sys/vm/drop_caches`
+- Restart bloated Anvil: `sudo docker restart ${PROJECT_NAME}-anvil-1` (grows to 12GB+ over hours)
+- Kill orphan node processes from dead worktrees
+
+## Dangerous (escalate)
+- `docker system prune -a --volumes` — kills CI images, hours to rebuild
+- Stopping project stack containers — breaks dev environment
+- OOM that survives all safe fixes — needs human decision on what to kill
+
+## Known Memory Hogs
+- `claude` processes from dev-agent: 200MB+ each, can zombie
+- `dockerd`: 600MB+ baseline (normal)
+- `openclaw-gateway`: 500MB+ (normal)
+- Anvil container: starts small, grows unbounded over hours
+- `forge build` with via_ir: can spike to 4GB+. Use `--skip test script` to reduce.
+- Vite dev servers inside containers: 150MB+ each
+
+## Lessons Learned
+- After killing processes, always `sync && echo 3 | sudo tee /proc/sys/vm/drop_caches`
+- Swap doesn't drain from dropping caches alone — it's actual paged-out process memory
+- Running CI + full project stack = 14+ containers on 8GB. Only one pipeline at a time.