chore: fix

Author: ovr

rust/cubestore/CLAUDE.md

@@ -144,10 +144,16 @@ The codebase uses a custom dependency injection system defined in `config/inject
 The project includes Docker configurations for building and deploying CubeStore:
 
 - **`builder.Dockerfile`**: Defines the base build image with Rust nightly-2025-08-01, LLVM 18, and build dependencies
-- **`Dockerfile`**: Production Dockerfile that uses `cubejs/rust-builder:bookworm-llvm-18` base image
-- **GitHub Actions**: CI/CD workflow in `.github/workflows/rust-cubestore.yml` uses the same Rust version
+- **`Dockerfile`**: Production Dockerfile that uses `cubejs/rust-builder:bookworm-llvm-18` base image and copies rust-toolchain.toml
+- **GitHub Actions**: Multiple CI/CD workflows use the same Rust version
 
-When updating the Rust version, ensure all these files are kept in sync:
-1. `rust-toolchain.toml` - Primary source of truth
-2. `builder.Dockerfile` - Builder image definition
-3. `.github/workflows/rust-cubestore.yml` - CI configuration
+## Updating Rust Version
+
+When updating the Rust version, ensure ALL these files are kept in sync:
+
+1. **`rust-toolchain.toml`** - Primary source of truth for local development
+2. **`builder.Dockerfile`** - Update the rustup default command with the new nightly version
+3. **`Dockerfile`** - Copies rust-toolchain.toml (no manual update needed if builder image is updated)
+4. **GitHub Workflows** - Update all occurrences of the Rust nightly version in `.github/workflows/` directory
+
+**Note**: The `cubejs/rust-builder:bookworm-llvm-18` Docker image tag may also need updating if the builder.Dockerfile changes significantly.