Add live dashboard with SSE job events

Expose /jobs, /dedup, and /events routes backed by a new EventBus that
broadcasts job lifecycle and per-job progress over SSE. Serve a static
dashboard from front/ that lists pending and in-progress jobs, streams
agent activity, and shows completed reviews.

Also add migrate-apply/migrate-generate scripts that load .env, update
the Containerfile to ship the front assets and use the apply script, and
refresh the roadmap.

crates/steep-server/src/job_queue.rs

@@ -23,17 +23,14 @@ impl JobQueue {
         Self { db }
     }
 
-    /// Enfile une nouvelle review.
-    ///
-    /// L'unicité de `event_id` fait échouer l'insertion d'un doublon.
-    pub async fn push(&self, webhook: WebhookType) -> toasty::Result<()> {
+    pub async fn push(&self, webhook: WebhookType) -> toasty::Result<Job> {
         let event_id = webhook.event_id();
         let repo = webhook.repository_full_name().to_string();
         let pr = webhook.pull_request_number();
 
         let mut db = self.db.clone();
 
-        toasty::create!(Job {
+        let job = toasty::create!(Job {
             event_id,
             repo,
             pr,
@@ -43,14 +40,9 @@ impl JobQueue {
         .exec(&mut db)
         .await?;
 
-        Ok(())
+        Ok(job)
     }
 
-    /// Flux des jobs en attente.
-    ///
-    /// C'est un `Stream` (et non un `Iterator`) : l'accès à la base est
-    /// asynchrone. Le flux interroge la table en boucle et met en tampon les
-    /// jobs trouvés.
     pub fn pending(&self) -> impl Stream<Item = Job> {
         let db = self.db.clone();
 
@@ -103,6 +95,13 @@ impl JobQueue {
 
         Ok(())
     }
+
+    pub async fn list(&self, status: JobStatus) -> toasty::Result<Vec<Job>> {
+        let mut db = self.db.clone();
+        let jobs = Job::filter_by_status(status).exec(&mut db).await?;
+
+        Ok(jobs)
+    }
 }
 
 #[cfg(test)]