feat(stovepipe): add Queue coordination entity#309
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Add the per-queue Queue control row that backs the process stage's concurrency gate and backlog coalescing: last_green_uri (incremental baseline), in_flight_count and max_concurrent (the concurrency gate), latest_request_seq (the coalescing pointer), and version for optimistic-locking CAS. Matches the entity model in the process RFC. No timestamps, consistent with the existing Request entity. Pure data struct with no message-payload serialization (Queue is a persisted control record, not a queue message).
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Why?
Implementing
processstep. This change creates a Queue entity to keep track of queue-level state.Additional details: https://github.com/uber/submitqueue/blob/mnoah1/process-docs-update/doc/rfc/stovepipe/steps/process.md
What?
Add the per-queue Queue control row that backs the process stage's concurrency gate and backlog coalescing: last_green_uri (incremental baseline), in_flight_count and max_concurrent (the concurrency gate), latest_request_seq (the coalescing pointer), and version for optimistic-locking CAS. Matches the entity model in the process RFC.
Test Plan
-Subsequent PRs will build out functionality that we can test