fix: update agent instructions for sessions_spawn, remove stale references

- AGENTS.md (bull/bear/hawk/dove): replace sessions_send references with
  sessions_spawn task-based protocol
- SOUL.md (bull/bear): remove memory_search (unavailable in sub-agents)
- SOUL.md (hawk/dove): remove REPLY_SKIP (not needed with spawn)
- AGENTS.md (invest-analyst): restore daily briefing format and memory rules
- deploy.sh: fix nvm loading for SSH non-interactive shell

openclaw-skills/deploy.sh

@@ -34,7 +34,7 @@ echo ""
 
 # --- Phase 3: Restart gateway ---
 echo "[3/3] Restarting OpenClaw gateway..."
-ssh "$REMOTE" "openclaw gateway restart"
+ssh "$REMOTE" 'export NVM_DIR="$HOME/.nvm"; [ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"; openclaw gateway restart'
 echo ""
 
 echo "=== Deploy complete ==="