feat: Scheduled Execution with Cron and Retry Handling

Dockerfile

@@ -11,6 +11,7 @@ RUN apt-get update \
         git \
         ca-certificates \
         tzdata \
+        util-linux \
     && rm -rf /var/lib/apt/lists/*
 
 RUN groupadd --system bot \
@@ -27,14 +28,19 @@ RUN pip install --no-cache-dir --upgrade pip \
 
 COPY --chown=bot:bot crontab/ /app/crontab/
 COPY --chown=bot:bot entrypoint.sh /app/entrypoint.sh
+COPY --chown=bot:bot run-bot.sh /app/run-bot.sh
+COPY --chown=root:root run-bot.sh /usr/local/bin/run-bot.sh
 COPY --chown=bot:bot src/ /app/src/
 
 RUN chmod 0755 /app/entrypoint.sh \
     && chmod 0755 /app/crontab/install-cron.sh \
+    && chmod 0755 /app/run-bot.sh \
+    && chmod 0755 /usr/local/bin/run-bot.sh \
     && chmod 0644 /app/crontab/tenbackward.cron
 
 ENV PYTHONPATH=/app/src
 
-USER bot
-
+# Note: entrypoint.sh runs as root so it can install /etc/cron.d/tenbackward
+# and exec cron -f. The cron-launched wrapper drops to the unprivileged
+# `bot` user before invoking Python.
 ENTRYPOINT ["/app/entrypoint.sh"]