Ignore both Rust and Python build artifacts

.gitignore

@@ -1,4 +1,8 @@
-# Python
+# --- Rust ---------------------------------------------------------------
+# Cargo build output (debug/release builds, incremental caches)
+/target/
+
+# --- Python -------------------------------------------------------------
 __pycache__/
 *.pyc
 *.pyo
@@ -11,15 +15,16 @@ __pycache__/
 .ruff_cache/
 .pytest_cache/
 
-# Environment and secrets
-.env
-
 # Logs (loguru file sink)
 logs/
 
 # PyInstaller build artifacts (dist/ is committed — see DESIGN_DOCUMENT §13)
 build/
 
+# --- Common -------------------------------------------------------------
+# Environment and secrets
+.env
+
 # Curator runtime metadata (user/machine-specific, regenerated)
 .Curator.!gtag
 *.!gtag
@@ -35,4 +40,3 @@ AGENTS.md
 CLAUDE.md
 DESIGN_DOCUMENT.md
 .claude/
-