working on workflows

docker/Dockerfile.worker.optimized

@@ -35,6 +35,9 @@ RUN apt-get update && apt-get install -y \
 
 WORKDIR /build
 
+# Increase rustc stack size to prevent SIGSEGV during release builds
+ENV RUST_MIN_STACK=16777216
+
 # Copy dependency metadata first so `cargo fetch` layer is cached
 # when only source code changes (Cargo.toml/Cargo.lock stay the same)
 COPY Cargo.toml Cargo.lock ./