feat(railiance): adopt state-hub edge relay beachhead for WP-0015

Deploy actcore-statehub-edge-relay, point STATE_HUB_URL at it, retire the
bespoke state-hub bridge, and accept edge-relay queued write receipts in
report and ops evidence sinks.

tests/test_state_hub_write.py

@@ -11,6 +11,7 @@ from activity_core.state_hub_write import (
     apply_progress_scope_fields,
     idempotency_headers,
     idempotency_key,
+    parse_state_hub_write_response,
 )
 
 
@@ -81,6 +82,8 @@ def test_report_sink_post_sends_idempotency_header(monkeypatch) -> None:
     monkeypatch.setattr(report_sinks, "_progress_exists", lambda *a, **k: False)
 
     class _Resp:
+        status_code = 200
+
         def raise_for_status(self) -> None: ...
         def json(self) -> dict[str, str]:
             return {"id": "pid-1"}
@@ -98,3 +101,47 @@ def test_report_sink_post_sends_idempotency_header(monkeypatch) -> None:
     result = report_sinks._post_state_hub_progress(payload, report_entry, sink)
     assert result["status"] == "posted"
     assert captured["headers"][IDEMPOTENCY_HEADER] == "run1:daily-triage-report:daily_triage"
+
+
+def test_parse_state_hub_write_response_accepts_edge_relay_queued_receipt() -> None:
+    class _Resp:
+        status_code = 202
+
+        def json(self) -> dict[str, object]:
+            return {
+                "queued": True,
+                "outbox_id": "env-1",
+                "idempotency_key": "run1:daily-triage-report:daily_triage",
+            }
+
+        def raise_for_status(self) -> None:
+            raise AssertionError("queued receipts should not raise")
+
+    assert parse_state_hub_write_response(_Resp())["outbox_id"] == "env-1"
+
+
+def test_report_sink_post_accepts_edge_relay_queued_receipt(monkeypatch) -> None:
+    monkeypatch.setattr(report_sinks, "_progress_exists", lambda *a, **k: False)
+
+    class _Resp:
+        status_code = 202
+
+        def json(self) -> dict[str, object]:
+            return {
+                "queued": True,
+                "outbox_id": "env-1",
+                "idempotency_key": "run1:daily-triage-report:daily_triage",
+            }
+
+        def raise_for_status(self) -> None:
+            raise AssertionError("queued receipts should not raise")
+
+    monkeypatch.setattr(report_sinks.httpx, "post", lambda *a, **k: _Resp())
+
+    payload = {"run_id": "run1", "activity_id": "act1", "scheduled_for": None}
+    report_entry = {"instruction_id": "daily-triage-report", "report": {"summary": "s"}}
+    sink = {"event_type": "daily_triage"}
+
+    result = report_sinks._post_state_hub_progress(payload, report_entry, sink)
+    assert result["status"] == "queued"
+    assert result["outbox_id"] == "env-1"