feat: self healing skyvern api key (#3614)

Co-authored-by: Suchintan <suchintan@users.noreply.github.com>
Co-authored-by: Shuchang Zheng <wintonzheng0325@gmail.com>

tests/unit_tests/test_internal_auth.py

@@ -0,0 +1,35 @@
+from starlette.requests import Request
+
+from skyvern.forge.sdk.routes.internal_auth import _is_local_request
+
+
+def _make_request(host: str | None) -> Request:
+    scope = {
+        "type": "http",
+        "client": (host, 12345) if host else None,
+        "headers": [],
+        "method": "GET",
+        "path": "/",
+        "scheme": "http",
+    }
+    return Request(scope)
+
+
+def test_is_local_request_returns_false_for_public_ip() -> None:
+    request = _make_request("8.8.8.8")  # public IPv4 address
+    assert _is_local_request(request) is False
+
+
+def test_is_local_request_accepts_loopback() -> None:
+    request = _make_request("127.0.0.1")
+    assert _is_local_request(request) is True
+
+
+def test_is_local_request_accepts_private_networks() -> None:
+    request = _make_request("192.168.1.20")
+    assert _is_local_request(request) is True
+
+
+def test_is_local_request_handles_missing_client() -> None:
+    request = _make_request(None)
+    assert _is_local_request(request) is False