Add Maria WhatsApp+RAG bridge as a service (LXC 171)

Move the /tmp prototype (Baileys bridge + RAG consumer) into git as a
proper sibling project to discord-bridge/: own systemd --user units
(whatsapp bridge, rag consumer, dashboard, periodic Drive sync timer),
a filesystem document store with a stdlib control dashboard (start/
stop/restart, document CRUD, reindex, Google Drive sync via rclone),
and an idempotent ops/install.sh following the same conventions.

Co-Authored-By: Claude Agent <noreply@anthropic.com>

proxmox/lxc171-claude-agent/maria-whatsapp-bridge/ops/maria-rag.service

@@ -0,0 +1,48 @@
+# Unit systemd de UTILIZATOR pentru consumer-ul RAG al lui Maria (rag/consumer.py).
+#
+# Se instaleaza in ~/.config/systemd/user/maria-rag.service (vezi install.sh).
+#
+#   systemctl --user daemon-reload
+#   systemctl --user enable --now maria-rag
+#   journalctl --user -u maria-rag -f
+
+[Unit]
+Description=Consumer RAG pentru Maria — raspunde la mesajele din puntea WhatsApp
+Documentation=file:///workspace/romfastsql/proxmox/lxc171-claude-agent/maria-whatsapp-bridge/README.md
+After=network-online.target maria-whatsapp.service
+Wants=network-online.target
+# Nu e o dependinta stricta (poate porni si daca puntea WhatsApp inca nu e sus —
+# consumer.py doar face polling si tolereaza erori de retea), dar ordinea are sens.
+Wants=maria-whatsapp.service
+
+StartLimitIntervalSec=300
+StartLimitBurst=5
+
+[Service]
+Type=simple
+WorkingDirectory=/workspace/romfastsql/proxmox/lxc171-claude-agent/maria-whatsapp-bridge/rag
+EnvironmentFile=%h/.maria-bridge/env
+Environment=MARIA_BRIDGE_DIR=%h/.maria-bridge
+Environment=PYTHONUNBUFFERED=1
+
+ExecStartPre=/bin/mkdir -p %h/.maria-bridge/logs %h/.maria-bridge/documents
+ExecStart=%h/.maria-bridge/venv/bin/python consumer.py
+
+KillMode=control-group
+KillSignal=SIGTERM
+TimeoutStopSec=15
+
+Restart=on-failure
+RestartSec=5
+RestartSteps=5
+RestartMaxDelaySec=120
+
+MemoryHigh=256M
+MemoryMax=512M
+
+StandardOutput=append:%h/.maria-bridge/logs/rag.log
+StandardError=append:%h/.maria-bridge/logs/rag.log
+SyslogIdentifier=maria-rag
+
+[Install]
+WantedBy=default.target