feat(romhacks): add Discord rom-hack ingestion stack (DCE -> JDownloader -> RomM)

Inert by default: empty token keeps the orchestrator idle and DRY_RUN=true
suppresses downloads. Orchestrator exports per-generation forum threads via
DiscordChatExporter, extracts download links + art, stages metadata, and writes
JDownloader crawljobs. Armed here with an alt account token and all 11 romhack
forums, still in DRY_RUN pending first-cycle validation.

stacks/romhacks/orchestrator/Dockerfile

@@ -0,0 +1,15 @@
+# Orchestrator = DiscordChatExporter (has .NET + the DCE CLI) + Python for parsing.
+# Baking scripts + channels.json into the image avoids Portainer's relative
+# FILE-bind quirk (see docker-compose.yml header).
+FROM tyrrrz/discordchatexporter:stable
+
+USER root
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends python3 python3-requests \
+ && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+COPY orchestrate.py run.sh channels.json ./
+RUN chmod +x run.sh
+
+ENTRYPOINT ["./run.sh"]