docs: add Windows support note to README

- Document cross-platform support (Linux, macOS, Windows)
- Triggers CI with updated cimis-tsdb dependency that includes Windows file locking fix

Author: dl-alexandre

README.md

@@ -31,6 +31,7 @@ Dependency note:
 - This repository expects `cimis-tsdb` at `./_deps/cimis-tsdb` (see `go.mod` replace rule).
 - CI checks out the dependency into that path.
 - Local development should mirror the same layout for deterministic builds.
+- Now supports Linux, macOS, and Windows (cross-platform file locking)
 
 For a **pure-Go build** (no C compiler required):