\begin{figure}[ht]
\centering
\begin{tikzpicture}[
  font=\small,
  box/.style={draw=ipsblue, rounded corners=2pt, align=center, inner sep=4pt, minimum height=0.85cm, minimum width=2.3cm},
  ext/.style={draw=ipsgrey, dashed, rounded corners=2pt, align=center, inner sep=4pt, minimum height=0.85cm},
  arr/.style={-{Latex}, thick, ipsblue},
  dbarr/.style={-{Latex}, thick, ipsgrey}
]
  \node[box, fill=codebg] (desk) {Desktop\\Electron};
  \node[box, fill=codebg, right=1.7cm of desk] (gw) {api\_gateway\\:8189};
  \node[box, below=1.05cm of gw] (ext) {extraction\\(+ workers)};
  \node[box, left=0.7cm of ext] (clean) {cleaning\\:8002};
  \node[box, right=0.7cm of ext] (count) {count-api\\:8080};
  \node[box, below=1.05cm of ext] (bot) {bot-descarga\\orquestador};
  \node[box, below left=1.15cm and 1.4cm of bot] (pg) {PostgreSQL};
  \node[box, below right=1.15cm and 1.4cm of bot] (redis) {Redis};
  \node[ext, left=1.5cm of desk] (agent) {Agent Selenium\\(PC externo)};
  \node[ext, below=2.5cm of agent] (minio) {MinIO/S3};
  \node[ext, below=0.85cm of minio] (img) {Imaging};

  % HTTP via gateway
  \draw[arr] (desk) -- (gw);
  \draw[arr] (gw) -- (ext);
  \draw[arr] (gw) -- (clean);
  \draw[arr] (gw) -- (count);
  \draw[arr] (gw) -- (bot);
  \draw[arr] (agent) |- (gw);

  % PostgreSQL: solo servicios de dominio (NO gateway, NO count-api)
  \draw[dbarr] (ext) -- (pg);
  \draw[dbarr] (clean) |- (pg);
  \draw[dbarr] (bot) -- (pg);

  % Redis: cola ARQ (extraction/workers)
  \draw[dbarr] (ext) -- (redis);

  % MinIO / Imaging
  \draw[arr] (agent) -- (minio);
  \draw[arr] (bot) -| (minio);
  \draw[arr] (agent) -- (img);
\end{tikzpicture}
\caption{Arquitectura bajo prueba. El \textbf{gateway no habla con Postgres}: solo hace proxy HTTP.
Usan la BD compartida: \texttt{extraction} (+ workers), \texttt{cleaning} y \texttt{bot-descarga}.
\texttt{count-api} hace OCR y \textbf{devuelve JSON} (no escribe en PG); el Desktop/extraction
persiste esos resultados con \texttt{POST /count-jobs} en Postgres.}
\label{fig:arquitectura}
\end{figure}