chore: bump version to 0.1.9

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: star-ga

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mind"
-version = "0.1.8"
+version = "0.1.9"
 edition = "2021"
 rust-version = "1.82"
 authors = ["STARGA Inc."]