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.

Cargo.toml

@@ -17,7 +17,7 @@ sentry = { version = "0.49", features = ["tower-axum-matched-path"] }
 sentry-anyhow = { version = "0.49", features = ["backtrace"] }
 dotenvy = "0.15"
 tower = "0.5"
-tower-http = { version = "0.7", features = ["trace"] }
+tower-http = { version = "0.7", features = ["trace", "fs"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 axum = "0.8"
@@ -30,7 +30,7 @@ metrics = "0.24"
 metrics-exporter-prometheus = { version = "0.18", default-features = false, features = ["http-listener"] }
 toasty = { version = "0.11", features = ["postgresql", "serde", "jiff"] }
 toasty-cli = "0.11"
-jiff = "0.2"
+jiff = { version = "0.2", features = ["serde"] }
 
 [profile.release]
 debug = 1