ranade-oss turns upstream intake into a self-draining review queue

ranade-oss has reset the starting point for intake and widened the search for closed proposals, so the system can classify more of the upstream backlog while avoiding duplicate work.

• Historical intake: reviews up to 500 closed proposals and records which ones have already been handled.
• Self-draining batches: a completed low-risk batch starts the next suitable batch and routes escalations onward.
• Deferred decisions: medium- and high-risk items remain tracked until they can progress through the appropriate review path.
• Human stop point: high-risk work still ends as a draft proposal, awaiting one explicit readiness decision.