fix: treat setup script failure as non-blocking in bootstrap turn start

Setup script failures in dispatchBootstrapTurnStart were re-thrown as
RouteRequestError, causing the entire bootstrap to fail and the
already-created thread to be deleted (along with the user's message).

This was inconsistent with GitManager.preparePullRequestThread, which
intentionally swallows the same kind of error via Effect.catch +
Effect.logWarning.

Remove the Effect.fail re-throw so the error handler only logs the
'setup-script.failed' activity and allows the bootstrap to continue,
matching the non-blocking semantics used elsewhere.

Author: cursoragent

apps/server/src/wsServer.ts

@@ -733,10 +733,7 @@ export const createServer = Effect.fn(function* (): Effect.fn.Return<
                       worktreePath: targetWorktreePath,
                     },
                     tone: "error",
-                  }).pipe(
-                    Effect.ignoreCause({ log: false }),
-                    Effect.flatMap(() => Effect.fail(toBootstrapRouteRequestError(error))),
-                  ),
+                  }).pipe(Effect.ignoreCause({ log: false })),
                 ),
               );
           })()