feat: embedded mitmproxy capture addon and proxy server

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_proxy.py

@@ -0,0 +1,34 @@
+from types import SimpleNamespace
+
+from auto_reverse.proxy import flow_from_mitm
+
+
+def _fake_mitm_flow():
+    request = SimpleNamespace(
+        method="POST", pretty_host="ex.com", path="/api/users?role=admin",
+        headers={"content-type": "application/json"}, content=b'{"name": "Ada"}',
+        query=SimpleNamespace(fields=[("role", "admin")]),
+    )
+    response = SimpleNamespace(
+        status_code=201, headers={"content-type": "application/json"},
+        content=b'{"id": 1}',
+    )
+    return SimpleNamespace(request=request, response=response, timestamp_start=1.5)
+
+
+def test_flow_from_mitm_maps_fields():
+    captured = flow_from_mitm(_fake_mitm_flow())
+    assert captured.method == "POST"
+    assert captured.host == "ex.com"
+    assert captured.path == "/api/users"
+    assert captured.query == {"role": ["admin"]}
+    assert captured.status == 201
+    assert captured.request_json() == {"name": "Ada"}
+    assert captured.response_json() == {"id": 1}
+
+
+def test_flow_from_mitm_handles_missing_response():
+    flow = _fake_mitm_flow()
+    flow.response = None
+    captured = flow_from_mitm(flow)
+    assert captured is None