- Make logs go to stderr by default (keep LSP stdout clean).
- Add --log-stderr/--log-stdout flags and wire config.use_stderr into spdlog.
- Log an explicit message when waiting for LSP input on stdin.
- export Run() from launcher module and add non-module main TU
- apply same pattern to module-based test executables
- migrate utils/string implementation fully into string.cppm and drop string.cpp
- point clangd to linux build compilation database
csh