v0.2.1

- Paths with spaces compile. MetaEditor wrote no result for a source whose path had a space in it, so every such file failed with "MetaEditor wrote no result". The file is now compiled through a space-free link to its `MQL4`/`MQL5` folder (or its own folder when loose), and the messages show the real paths.
- A stale `.ex4`/`.ex5` no longer survives a failed compile. MetaEditor deletes the old output when a file has errors, but not a read-only one and not when it writes no result. The old output is now deleted before each file compiles.
- Two runs at once no longer collide. They shared one Wine prefix and one log file; now a run holds a lock for its whole length, and a second run logs that it is waiting and starts when the first ends.
- The run log keeps its last lines. A run that failed quickly could leave `last-run.log` empty, because the container exited before the copy was written. The script now waits for it.
- Errors in standard headers point at the real file, its path in the toolchain. They showed the header under your own `Include` folder, where no such file exists.
- A path with `&` in it no longer garbles the messages. Path rewriting uses plain string replacement instead of `sed`, and drops the current folder only where a path starts.
- A `.mq4` inside an `MQL5` folder inside an `MQL4` folder finds its includes. The command mounted the nearest `MQL4` or `MQL5` folder, while the compiler looks for `MQL4` above a `.mq4` and `MQL5` above a `.mq5`; the command now mounts the folder the compiler uses.
- Running with no path from `/` fails with exit `2` and a message, instead of Docker refusing the mount with exit `125`.
- The signer check reads only the signing certificate. It accepted "MetaQuotes" anywhere in any subject of the report; it now requires the signing certificate's common name to start with `MetaQuotes`.
- `--uninstall` removes the image the command was pinned to. The local `:dev` image and the cache volume stay.
- The README walks through a run step by step: the file order, one file at a time in one container, how the extension picks MT4 or MT5, how the `MQL4`/`MQL5` folder picks the includes, where the `.ex4`/`.ex5` and the run log go, and how to read the log.
- The docs no longer claim files compile in path order across arguments. The order is the arguments as given, each folder's files sorted, a duplicate only once.
- The exit codes are documented in full: no sources found exits `2`, a file MetaEditor wrote no result for counts as `1`, and a Docker failure returns Docker's own code (usually `125`).
- The README, the skill and the installation reference cover the amd64-only image, what the container can see, symlinks, parallel runs, switching installers with a new `MQL_COMPILER_VOLUME`, and every error message the tool prints.
- `--help` lists `--setup` and `-h` in its synopsis and says where the run log goes.
- `.agents/rules/` holds the project rules for contributors, linked from `AGENTS.md`.