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",

crates/adapters/nats/src/lib.rs

@@ -100,9 +100,7 @@ impl MessageSource for NatsMessageSource {
             if let Ok(info) = stream.consumer_info(CONSUMER_NAME).await
                 && info.config.deliver_subject.is_some()
             {
-                tracing::info!(
-                    "deleting old push consumer '{CONSUMER_NAME}', replacing with pull"
-                );
+                tracing::info!("deleting old push consumer '{CONSUMER_NAME}', replacing with pull");
                 let _ = stream.delete_consumer(CONSUMER_NAME).await;
             }
 

crates/bootstrap/Cargo.toml

@@ -13,6 +13,9 @@ application     = { workspace = true }
 adapters-auth   = { workspace = true }
 
 adapters-storage   = { workspace = true, features = ["s3"] }
+adapters-nats      = { workspace = true }
+event-transport    = { workspace = true }
+async-nats         = { workspace = true }
 
 presentation    = { workspace = true }
 

crates/bootstrap/src/config.rs

@@ -3,6 +3,7 @@ pub struct Config {
     pub host: String,
     pub port: u16,
     pub database_url: String,
+    pub nats_url: String,
     pub jwt_secret: String,
     pub cors_allowed_origins: Vec<String>,
 }
@@ -17,6 +18,8 @@ impl Config {
                 .and_then(|p| p.parse().ok())
                 .unwrap_or(3000),
             database_url: std::env::var("DATABASE_URL").expect("DATABASE_URL must be set"),
+            nats_url: std::env::var("NATS_URL")
+                .unwrap_or_else(|_| "nats://localhost:4222".to_string()),
             jwt_secret: std::env::var("JWT_SECRET").expect("JWT_SECRET must be set"),
             cors_allowed_origins: std::env::var("CORS_ALLOWED_ORIGINS")
                 .unwrap_or_else(|_| "http://localhost:3000".to_string())

crates/bootstrap/src/factory.rs

@@ -55,13 +55,15 @@ use presentation::{
 };
 
 use crate::config::Config;
-use crate::log_event_publisher::LogEventPublisher;
 use crate::log_sidecar_writer::LogSidecarWriter;
 
 pub async fn build_app(config: &Config) -> Result<Router> {
     let pool = connect(&config.database_url).await?;
     run_migrations(&pool).await?;
 
+    let nats_client = async_nats::connect(&config.nats_url).await?;
+    adapters_nats::ensure_stream(&nats_client).await?;
+
     // Identity
     let user_repo = Arc::new(PostgresUserRepository::new(pool.clone()));
     let hasher = Arc::new(BcryptPasswordHasher);
@@ -91,7 +93,9 @@ pub async fn build_app(config: &Config) -> Result<Router> {
     let batch_repo = Arc::new(PostgresJobBatchRepository::new(pool.clone()));
     let plugin_repo = Arc::new(PostgresPluginRepository::new(pool.clone()));
     let pipeline_repo = Arc::new(PostgresPipelineRepository::new(pool.clone()));
-    let event_publisher: Arc<LogEventPublisher> = Arc::new(LogEventPublisher);
+    let transport = adapters_nats::NatsTransport::new(nats_client);
+    let event_publisher: Arc<dyn domain::ports::EventPublisher> =
+        Arc::new(event_transport::EventPublisherAdapter::new(transport));
     let sidecar_writer: Arc<LogSidecarWriter> = Arc::new(LogSidecarWriter);
 
     // File storage

crates/bootstrap/src/lib.rs

@@ -1,4 +1,3 @@
 pub mod config;
 pub mod factory;
-pub mod log_event_publisher;
 pub mod log_sidecar_writer;

crates/bootstrap/src/log_event_publisher.rs

@@ -1,12 +0,0 @@
-use async_trait::async_trait;
-use domain::{errors::DomainError, events::DomainEvent, ports::EventPublisher};
-
-pub struct LogEventPublisher;
-
-#[async_trait]
-impl EventPublisher for LogEventPublisher {
-    async fn publish(&self, event: &DomainEvent) -> Result<(), DomainError> {
-        tracing::info!(?event, "domain event published");
-        Ok(())
-    }
-}

crates/bootstrap/src/main.rs

@@ -3,7 +3,6 @@ use tracing::info;
 
 mod config;
 mod factory;
-mod log_event_publisher;
 mod log_sidecar_writer;
 
 #[tokio::main]

crates/worker/Cargo.toml

@@ -13,6 +13,9 @@ application       = { workspace = true }
 
 adapters-postgres  = { path = "../adapters/postgres" }
 adapters-storage   = { workspace = true }
+adapters-nats      = { workspace = true }
+event-transport    = { workspace = true }
+async-nats         = { workspace = true }
 
 tokio             = { workspace = true }
 anyhow            = { workspace = true }

crates/worker/src/config.rs

@@ -1,6 +1,7 @@
 #[derive(Debug, Clone)]
 pub struct WorkerConfig {
     pub database_url: String,
+    pub nats_url: String,
     pub poll_interval_secs: u64,
     pub storage_path: String,
 }
@@ -10,6 +11,7 @@ impl WorkerConfig {
         dotenvy::dotenv().ok();
         Self {
             database_url: std::env::var("DATABASE_URL").expect("DATABASE_URL must be set"),
+            nats_url: std::env::var("NATS_URL").unwrap_or_else(|_| "nats://localhost:4222".into()),
             poll_interval_secs: std::env::var("POLL_INTERVAL_SECS")
                 .ok()
                 .and_then(|v| v.parse().ok())

crates/worker/src/main.rs

@@ -24,12 +24,19 @@ async fn main() -> anyhow::Result<()> {
     let pool = adapters_postgres::connect(&config.database_url).await?;
     adapters_postgres::run_migrations(&pool).await?;
 
+    let nats_client = async_nats::connect(&config.nats_url).await?;
+    adapters_nats::ensure_stream(&nats_client).await?;
+    info!(nats_url = %config.nats_url, "NATS connected");
+
     let repos = Repos::new(pool);
     let file_storage = Arc::new(adapters_storage::LocalFileStorage::new(
         &config.storage_path,
     ));
     let sidecar_writer: Arc<dyn domain::ports::SidecarWriterPort> = Arc::new(LogSidecarWriter);
-    let event_pub: Arc<dyn domain::ports::EventPublisher> = Arc::new(LogEventPublisher);
+
+    let transport = adapters_nats::NatsTransport::new(nats_client);
+    let event_pub: Arc<dyn domain::ports::EventPublisher> =
+        Arc::new(event_transport::EventPublisherAdapter::new(transport));
 
     let registry = Arc::new(build_plugin_registry(&repos, file_storage, sidecar_writer));
     let process_next = build_process_next_handler(&repos, registry, event_pub);
@@ -49,19 +56,6 @@ async fn main() -> anyhow::Result<()> {
     }
 }
 
-struct LogEventPublisher;
-
-#[async_trait::async_trait]
-impl domain::ports::EventPublisher for LogEventPublisher {
-    async fn publish(
-        &self,
-        event: &domain::events::DomainEvent,
-    ) -> Result<(), domain::errors::DomainError> {
-        info!(event = ?event, "domain event");
-        Ok(())
-    }
-}
-
 struct LogSidecarWriter;
 
 #[async_trait::async_trait]