Add support for pre-configured runners from environment variables

- Added RUNNERS env var to .env.example (comma-separated runner names)
- Updated supervisor binary to accept --runners flag
- Runners are automatically registered on startup using first admin secret
- Updated run.sh to pass RUNNERS from env to supervisor binary

core/src/bin/supervisor.rs

@@ -44,6 +44,10 @@ struct Args {
     /// Mycelium topic for supervisor RPC messages
     #[arg(long, default_value = "supervisor.rpc")]
     topic: String,
+    
+    /// Pre-configured runner names (comma-separated)
+    #[arg(long, value_name = "NAMES", value_delimiter = ',')]
+    runners: Vec<String>,
 }
 
 #[tokio::main]
@@ -51,6 +55,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     env_logger::init();
     let args = Args::parse();
 
+    // Store first admin secret for runner registration
+    let admin_secret = args.admin_secrets[0].clone();
+
     // Build supervisor
     let mut builder = SupervisorBuilder::new()
         .redis_url(&args.redis_url)
@@ -65,7 +72,17 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         builder = builder.register_secrets(args.register_secrets);
     }
 
-    let supervisor = builder.build().await?;
+    let mut supervisor = builder.build().await?;
+    
+    // Register pre-configured runners using first admin secret
+    if !args.runners.is_empty() {
+        for runner_name in &args.runners {
+            match supervisor.register_runner(&admin_secret, runner_name, &format!("queue:{}", runner_name)).await {
+                Ok(_) => {},
+                Err(e) => error!("Failed to register runner '{}': {}", runner_name, e),
+            }
+        }
+    }
     
     // Start OpenRPC server
     use std::sync::Arc;