refactor(launcher): set stable compose project via top-level name

Set the project name declaratively as a top-level `name: mpc-node` in the
rendered compose file instead of passing `-p mpc` on the command line (per
review). The project identity now travels with the compose config and is
covered by render tests. Behaviour is unchanged: a stable project name keeps
the container reused across restarts, preserving its logs.

Author: barakeinav1

crates/tee-launcher/assets/mpc-node-docker-compose.tee.template.yml

@@ -1,3 +1,5 @@
+name: mpc-node
+
 services:
   mpc-node:
     image: "{{IMAGE_NAME}}@{{MANIFEST_DIGEST}}"

crates/tee-launcher/assets/mpc-node-docker-compose.template.yml

@@ -1,3 +1,5 @@
+name: mpc-node
+
 services:
   mpc-node:
     image: "{{IMAGE_NAME}}@{{MANIFEST_DIGEST}}"

crates/tee-launcher/src/compose.rs

@@ -59,11 +59,12 @@ pub fn launch_mpc_container(
     let compose_file = render_compose_file(platform, port_mappings, image_name, manifest_digest)?;
     let compose_path = compose_file.path().display().to_string();
 
-    // Use a stable compose project (`-p`) so the container is reused across
-    // restarts rather than recreated, preserving its logs. Compose
-    // recreates it only when the rendered config (e.g. image digest) changes.
+    // The compose file pins a stable top-level project `name`, so the
+    // container is reused across restarts rather than recreated, preserving its
+    // logs. Compose recreates it only when the rendered config (e.g. image
+    // digest) changes.
     let run_output = Command::new("docker")
-        .args(["compose", "-p", "mpc", "-f", &compose_path, "up", "-d"])
+        .args(["compose", "-f", &compose_path, "up", "-d"])
         .output()
         .map_err(|inner| LauncherError::DockerRunFailed {
             image_hash: manifest_digest.clone(),
@@ -263,4 +264,19 @@ mod tests {
         // then
         assert!(!rendered.contains("environment:"));
     }
+
+    #[test]
+    fn includes_stable_project_name() {
+        // given
+        let port_mappings = empty_port_mappings();
+        let digest = sample_digest();
+
+        // when
+        let rendered = render(Platform::Tee, &port_mappings, &digest);
+
+        // then — a stable top-level project name keeps Compose reusing the
+        // container across restarts instead of recreating it (which would wipe
+        // its logs)
+        assert!(rendered.contains("name: mpc-node"));
+    }
 }