process_file now marks messages processed only after a real crawljob write, so
DRY_RUN no longer poisons the state and link-less posts get re-checked after the
host filter widens. State file reset alongside this so the arm cycle re-enqueues
all threads.
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.