fix: add --all to cargo fmt in script/test and autoformat codebase

cargo fmt without --all fails with "Failed to find targets" in
workspace repos. This was blocking every story's gates. Also ran
cargo fmt --all to fix all existing formatting issues.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

script/test

@@ -16,7 +16,7 @@ fi
 
 echo "=== Checking Rust formatting ==="
 if cargo fmt --version &>/dev/null; then
-  cargo fmt --manifest-path "$PROJECT_ROOT/Cargo.toml" --check
+  cargo fmt --manifest-path "$PROJECT_ROOT/Cargo.toml" --all --check
 else
   echo "Skipping Rust formatting check (rustfmt not installed)"
 fi