chore: snapshot working tree - pty_exited notifications + in-flight inference WIP

feat(booterm): structured pty_exited WS notifications. Plan-validated, impl-validated, code-reviewed green (contracts build clean, contracts test 29/29, booterm + web typecheck clean).

wip: in-progress inference/provider refactor (agents.ts, provider.ts, new llama-providers.ts, removed llama-args-validator), plus arena, dispatcher, compaction, schema changes.

openspec: pty-exit-notifications complete; x-agent-flags planned (not yet implemented).

apps/control/boocontrol.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=BooControl fleet cockpit service
+After=network-online.target postgresql.service
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=samkintop
+Group=samkintop
+WorkingDirectory=/home/samkintop/opt/boocode
+ExecStart=/home/samkintop/.local/share/pnpm/global/5/.pnpm/node_modules/pnpm/bin/pnpm.cjs start -C apps/control start
+Restart=on-failure
+RestartSec=5
+EnvironmentFile=/home/samkintop/opt/boocode/apps/control/.env.host
+
+[Install]
+WantedBy=multi-user.target