feat: wire NATS event publisher into bootstrap + worker

- Both binaries connect to NATS on startup, ensure JetStream stream
- EventPublisherAdapter<NatsTransport> replaces LogEventPublisher
- nats_url config with default nats://localhost:4222
- Deleted bootstrap's LogEventPublisher (no longer needed)

Cargo.lock

@@ -309,14 +309,17 @@ name = "bootstrap"
 version = "0.1.0"
 dependencies = [
  "adapters-auth",
+ "adapters-nats",
  "adapters-postgres",
  "adapters-storage",
  "anyhow",
  "application",
+ "async-nats",
  "async-trait",
  "axum",
  "domain",
  "dotenvy",
+ "event-transport",
  "presentation",
  "tokio",
  "tower-http",
@@ -3559,13 +3562,16 @@ dependencies = [
 name = "worker"
 version = "0.1.0"
 dependencies = [
+ "adapters-nats",
  "adapters-postgres",
  "adapters-storage",
  "anyhow",
  "application",
+ "async-nats",
  "async-trait",
  "domain",
  "dotenvy",
+ "event-transport",
  "tokio",
  "tracing",
  "tracing-subscriber",