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)

crates/worker/Cargo.toml

@@ -11,8 +11,11 @@ path = "src/main.rs"
 domain            = { workspace = true }
 application       = { workspace = true }
 
-adapters-postgres = { path = "../adapters/postgres" }
-adapters-storage  = { 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 }