fix: reduce global eslint warnings (#216)

src/db/service-handoffs.ts

@@ -211,6 +211,7 @@ function parseLastAgentSeqState(
       `Invalid last_agent_seq JSON for ${serviceId}: ${
         err instanceof Error ? err.message : String(err)
       }`,
+      { cause: err },
     );
   }
 

src/web-dashboard-server.ts

@@ -315,7 +315,9 @@ function restartEjclawStackServices(): string[] {
       throw error;
     }
     if (process.env.SERVICE_ID) {
-      throw new Error(MANAGED_SERVICE_CALLER_FALLBACK_MESSAGE);
+      throw new Error(MANAGED_SERVICE_CALLER_FALLBACK_MESSAGE, {
+        cause: error,
+      });
     }
 
     execFileSync('systemctl', [...systemctlArgs, 'restart', ...services], {

src/workspace-package-manager.ts

@@ -507,11 +507,13 @@ export function ensureWorkspaceDependenciesInstalled(
         const retryDetail = getInstallErrorDetail(retryError);
         throw new Error(
           `Failed to install workspace dependencies with "${command.commandText}" in ${repoDir} after cleaning node_modules: ${retryDetail}`,
+          { cause: retryError },
         );
       }
     } else {
       throw new Error(
         `Failed to install workspace dependencies with "${command.commandText}" in ${repoDir}: ${detail}`,
+        { cause: error },
       );
     }
   }