fix: handle concurrent table creation race in SQLite (#151)

scripts/pre-commit-hook.sh

@@ -1,8 +1,13 @@
 #!/usr/bin/env bash
-# Pre-commit hook: run tests with a wall-clock limit.
-# Blocks the commit if tests fail or take too long.
+# Pre-commit hook: lint + test with a wall-clock limit.
+# Blocks the commit if formatting, imports, or tests fail.
 # Current baseline: ~18s wall-clock. Limit set to 30s for headroom.
 
+echo "Auto-formatting (black + isort)..."
+poetry run python -m black --line-length 100 src/ tests/ --quiet
+poetry run isort --profile black --line-length 100 src/ tests/ --quiet 2>/dev/null
+git add -u
+
 MAX_SECONDS=30
 
 echo "Running tests (${MAX_SECONDS}s limit)..."