supervisor cleanup, documentation and minor fixes

bin/supervisor/src/openrpc.rs

@@ -22,9 +22,10 @@ use std::sync::Arc;
 use std::fs;
 use tokio::sync::Mutex;
 
-/// Load OpenRPC specification from docs/openrpc.json
+/// Load OpenRPC specification from docs/supervisor/openrpc.json
 fn load_openrpc_spec() -> Result<serde_json::Value, Box<dyn std::error::Error>> {
-    let path = "../../docs/openrpc.json";
+    // Path relative to the workspace root (where Cargo.toml is)
+    let path = concat!(env!("CARGO_MANIFEST_DIR"), "/../../docs/supervisor/openrpc.json");
     let content = fs::read_to_string(path)?;
     let spec = serde_json::from_str(&content)?;
     debug!("Loaded OpenRPC specification from: {}", path);