feat: add git-consistent memory gateway architecture

gateway/tests/test_query_flow.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+
+def test_query_flow_and_sync_before_query(client, repo):
+    first = client.post(
+        "/query",
+        json={
+            "branch": "main",
+            "query_type": "query",
+            "query": "alpha-main-signal",
+            "require_latest": True,
+        },
+    )
+    assert first.status_code == 200
+    first_payload = first.json()
+    assert first_payload["ok"] is True
+    assert first_payload["branch"] == "main"
+    assert first_payload["commit_hash"]
+    assert first_payload["synced_at"]
+    assert isinstance(first_payload["results"], list)
+    assert first_payload["results"]
+
+    repo.commit_on_branch(
+        "main",
+        "docs/new-sync-note.md",
+        "gamma-sync-proof\n",
+        "add sync proof",
+    )
+
+    second = client.post(
+        "/query",
+        json={
+            "branch": "main",
+            "query_type": "query",
+            "query": "gamma-sync-proof",
+            "require_latest": True,
+        },
+    )
+    assert second.status_code == 200
+    second_payload = second.json()
+    assert second_payload["commit_hash"] != first_payload["commit_hash"]
+    snippets = [row["snippet"] for row in second_payload["results"]]
+    assert any("gamma-sync-proof" in snippet for snippet in snippets)