feat(engine): scaffold runtime skeleton

Data/Engine/bootstrapper.py

@@ -0,0 +1,39 @@
+"""Command-line bootstrapper for the Stage 1 Engine runtime."""
+from __future__ import annotations
+
+import os
+from typing import Any, Dict
+
+from .server import create_app
+
+
+DEFAULT_HOST = "0.0.0.0"
+DEFAULT_PORT = 5001
+
+
+def _build_runtime_config() -> Dict[str, Any]:
+    return {
+        "HOST": os.environ.get("BOREALIS_ENGINE_HOST", DEFAULT_HOST),
+        "PORT": int(os.environ.get("BOREALIS_ENGINE_PORT", DEFAULT_PORT)),
+        "TLS_CERT_PATH": os.environ.get("BOREALIS_TLS_CERT"),
+        "TLS_KEY_PATH": os.environ.get("BOREALIS_TLS_KEY"),
+        "TLS_BUNDLE_PATH": os.environ.get("BOREALIS_TLS_BUNDLE"),
+    }
+
+
+def main() -> None:
+    config = _build_runtime_config()
+    app, socketio, context = create_app(config)
+
+    host = config.get("HOST", DEFAULT_HOST)
+    port = int(config.get("PORT", DEFAULT_PORT))
+
+    run_kwargs: Dict[str, Any] = {"host": host, "port": port}
+    if context.tls_bundle_path and context.tls_key_path:
+        run_kwargs.update({"certfile": context.tls_bundle_path, "keyfile": context.tls_key_path})
+
+    socketio.run(app, **run_kwargs)
+
+
+if __name__ == "__main__":  # pragma: no cover - manual launch helper
+    main()