Prepare 2.0.0 release candidate

scripts/run_python_tests.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+"""Run backend test files in fresh processes with the active interpreter.
+
+Several offline tests install small ComfyUI stubs in sys.modules. Isolating
+files prevents one test's fake runtime from changing another test's imports.
+"""
+
+from pathlib import Path
+import os
+import subprocess
+import sys
+
+
+def main():
+    root = Path(__file__).resolve().parent.parent
+    paths = [root / name for name in sys.argv[1:]] or sorted((root / "tests").glob("test_*.py"))
+    env = {**os.environ, "OMP_NUM_THREADS": "2", "MKL_NUM_THREADS": "2", "PYTHONDONTWRITEBYTECODE": "1"}
+    failed = []
+    for path in paths:
+        print(f"\n--- {path.name} ---", flush=True)
+        try:
+            result = subprocess.run([sys.executable, str(path)], cwd=root, env=env, timeout=180)
+            if result.returncode:
+                failed.append(path.name)
+        except subprocess.TimeoutExpired:
+            print("Timed out after 180 seconds.", flush=True)
+            failed.append(path.name)
+    print(f"\n{len(paths) - len(failed)}/{len(paths)} test files passed.", flush=True)
+    if failed:
+        print("Failed: " + ", ".join(failed), flush=True)
+    return bool(failed)
+
+
+if __name__ == "__main__":
+    sys.exit(main())