refactor: binary crate — thin main.rs + cli.rs dispatch

Slim binary that depends on sunbeam-sdk for all logic. Replaces 62
crate:: refs with sunbeam_sdk::. Tracing filter updated to include
sunbeam_sdk=info.

Cargo.lock

@@ -3550,6 +3550,19 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 [[package]]
 name = "sunbeam"
 version = "0.1.0"
+dependencies = [
+ "chrono",
+ "clap",
+ "rustls",
+ "sunbeam-sdk",
+ "tokio",
+ "tracing",
+ "tracing-subscriber",
+]
+
+[[package]]
+name = "sunbeam-sdk"
+version = "0.1.0"
 dependencies = [
  "base64",
  "chrono",
@@ -3569,7 +3582,6 @@ dependencies = [
  "rsa",
  "russh",
  "russh-keys",
- "rustls",
  "serde",
  "serde_json",
  "serde_yaml",
@@ -3580,7 +3592,6 @@ dependencies = [
  "tokio",
  "tokio-stream",
  "tracing",
- "tracing-subscriber",
 ]
 
 [[package]]

sunbeam/src/main.rs

@@ -0,0 +1,39 @@
+mod cli;
+
+#[tokio::main]
+async fn main() {
+    // Install rustls crypto provider (ring) before any TLS operations.
+    rustls::crypto::ring::default_provider()
+        .install_default()
+        .expect("Failed to install rustls crypto provider");
+
+    // Initialize tracing subscriber.
+    // Respects RUST_LOG env var (e.g. RUST_LOG=debug, RUST_LOG=sunbeam=trace).
+    // Default: warn for dependencies, info for sunbeam + sunbeam_sdk.
+    tracing_subscriber::fmt()
+        .with_env_filter(
+            tracing_subscriber::EnvFilter::try_from_default_env().unwrap_or_else(|_| {
+                tracing_subscriber::EnvFilter::new("sunbeam=info,sunbeam_sdk=info,warn")
+            }),
+        )
+        .with_target(false)
+        .with_writer(std::io::stderr)
+        .init();
+
+    match cli::dispatch().await {
+        Ok(()) => {}
+        Err(e) => {
+            let code = e.exit_code();
+            tracing::error!("{e}");
+
+            // Print source chain for non-trivial errors
+            let mut source = std::error::Error::source(&e);
+            while let Some(cause) = source {
+                tracing::debug!("caused by: {cause}");
+                source = std::error::Error::source(cause);
+            }
+
+            std::process::exit(code);
+        }
+    }
+}