update gitignore

.gitignore

@@ -1,8 +1,31 @@
+# Python/local environment (prototype legacy)
 __pycache__/
+**/__pycache__/
 venv/
 .venv/
+.pytest_cache/
+*.pyc
+*.pyo
+
+# Local-only config
+miner.conf
 config.py
+
+# C/C++ build artifacts
 *.o
+*.a
+*.so
+
+# Binaries produced by Makefile
 miner
 launcher
-miner.conf
+bench_hash
+test_sha256_backend
+test_miner_regression
+
+# Profiling / PGO artifacts
+.pgo/
+*.gcda
+*.gcno
+*.profraw
+*.profdata