fix: serialize Odin checking during bootstrap builds

Makefile

@@ -2,7 +2,7 @@
 
 build:
 	mkdir -p build
-	odin build . -out:build/brolang
+	odin build . -no-threaded-checker -out:build/brolang
 
 install: build
 	install -d "$(HOME)/.brolang/bin"

README.md

@@ -4,11 +4,15 @@ Prototype error-tolerant Brolang compiler written in Odin.
 
 ```sh
 mkdir -p build
-odin build . -out:build/brolang
+odin build . -no-threaded-checker -out:build/brolang
 ./build/brolang examples/programs/prototype -o build/prototype
 ./build/prototype
 ```
 
+Bootstrap builds serialize Odin type checking to avoid the `Queue(string)`
+polymorphic-type assertion observed with Odin `dev-2026-02`. Code generation
+is unchanged; `make build` and `make install` use the same flag.
+
 Programs may receive system I/O and process arguments explicitly through
 `process.Init`; `main func() ...` remains valid. Standard-stream helpers bind the
 provider, handle, and callback.