Function submit_review 

pub fn submit_review(
    db: &Db,
    project: &str,
    branch: &str,
    summary: Option<String>,
    thread_ids: &[String],
) -> Result<ReviewSet>

Seal a new review for (project, branch): mint its number (existing count + 1), stamp every still-unfiled user turn on each listed thread with the new review id, and append the ReviewSet. Turns already filed never move, so a thread whose earlier turns went into review 1 and whose reply goes into review 2 belongs to both. A thread that gains a turn this way is Addressed no longer - the agent owes an answer again - so it flips back to Open; a Resolved / Outdated thread keeps its state. Agent replies are answers to a round rather than part of one and are never stamped. One write transaction spans both tables so the stamp and the append land together.