feat: 扩展 Rust gateway 全功能模块，新增 billing/crypto/wallet crate 及完整数据层

- 新增 aether-billing、aether-crypto、aether-wallet 独立 crate
- aether-data 扩展 repository 层：announcements、auth_modules、billing、
  candidate_selection、gemini_file_mappings、global_models、management_tokens、
  oauth_providers、proxy_nodes、quota、users、wallet 等模块
- aether-gateway 新增 api/auth/billing/control/middleware/scheduler/usage/
  video_tasks/hooks/maintenance/model_fetch/provider_transport 等功能模块
- 重构 executor decision 和 gateway state 为模块目录结构
- 新增 gateway router、frontdoor 路由层及对应测试
- Python 侧 API 路由重构，新增 compat/support 模块
- 前端 Logo 组件更新及 Provider 管理页面调整

tests/unit/test_api_request_context.py

@@ -58,6 +58,8 @@ def _build_context(raw_body: bytes, headers: dict[str, str] | None = None) -> Ap
         api_key=None,
         request_id="req_test",
         start_time=0.0,
+        request_method="POST",
+        request_path="/v1/messages",
         client_ip="127.0.0.1",
         user_agent="pytest",
         original_headers=headers or {},
@@ -67,6 +69,74 @@ def _build_context(raw_body: bytes, headers: dict[str, str] | None = None) -> Ap
 
 
 class TestApiRequestContextEnsureJsonBody:
+    def test_build_prefers_request_state_request_id_over_trace_header(self) -> None:
+        request = _build_request(headers={"x-trace-id": "trace-frontdoor-123"})
+        request.state.request_id = "state-rid-001"
+
+        context = ApiRequestContext.build(
+            request=request,
+            db=None,  # type: ignore[arg-type]
+            user=None,
+            api_key=None,
+            raw_body=b"{}",
+        )
+
+        assert context.request_id == "state-rid-001"
+        assert request.state.request_id == "state-rid-001"
+
+    def test_build_prefers_trace_header_for_request_id(self) -> None:
+        request = _build_request(headers={"x-trace-id": "trace-frontdoor-123"})
+
+        context = ApiRequestContext.build(
+            request=request,
+            db=None,  # type: ignore[arg-type]
+            user=None,
+            api_key=None,
+            raw_body=b"{}",
+        )
+
+        assert context.request_id == "trace-frontdoor-123"
+        assert request.state.request_id == "trace-frontdoor-123"
+
+    def test_build_snapshots_request_method_path_and_path_params(self) -> None:
+        request = _build_request(headers={"x-trace-id": "trace-frontdoor-123"})
+        request.scope["method"] = "GET"
+        request.scope["path"] = "/v1beta/models/gemini-2.5-pro:generateContent"
+        request.scope["raw_path"] = b"/v1beta/models/gemini-2.5-pro:generateContent"
+        request.scope["path_params"] = {"model": "gemini-2.5-pro"}
+
+        context = ApiRequestContext.build(
+            request=request,
+            db=None,  # type: ignore[arg-type]
+            user=None,
+            api_key=None,
+            raw_body=b"{}",
+        )
+
+        assert context.request_method == "GET"
+        assert context.request_path == "/v1beta/models/gemini-2.5-pro:generateContent"
+        assert context.path_params == {"model": "gemini-2.5-pro"}
+
+    def test_build_snapshots_request_runtime_state(self) -> None:
+        request = _build_request(headers={"x-trace-id": "trace-frontdoor-123"})
+        request.state.prefetched_balance_remaining = "12.5"
+        request.state.gateway_execution_path = "public_proxy_after_executor_miss"
+        request.state.rate_limit_scope = "user"
+        request.state.tx_committed_by_route = True
+
+        context = ApiRequestContext.build(
+            request=request,
+            db=None,  # type: ignore[arg-type]
+            user=None,
+            api_key=None,
+            raw_body=b"{}",
+        )
+
+        assert context.prefetched_balance_remaining == 12.5
+        assert context.gateway_execution_path == "public_proxy_after_executor_miss"
+        assert context.rate_limit_scope == "user"
+        assert context.tx_committed_by_route is True
+
     def test_decompresses_gzip_body(self) -> None:
         payload = {"message": "hello", "count": 2}
         raw_body = gzip.compress(json.dumps(payload).encode("utf-8"))
@@ -88,6 +158,7 @@ class TestApiRequestContextEnsureJsonBody:
     def test_build_records_client_encoding_preferences(self) -> None:
         request = _build_request(
             headers={
+                "content-type": "application/json",
                 "content-encoding": "gzip",
                 "accept-encoding": "gzip, deflate",
             }
@@ -102,6 +173,31 @@ class TestApiRequestContextEnsureJsonBody:
 
         assert context.client_content_encoding == "gzip"
         assert context.client_accept_encoding == "gzip, deflate"
+        assert context.request_content_type == "application/json"
+
+    def test_build_records_perf_only_when_payload_not_empty(self) -> None:
+        request = _build_request(headers={"x-trace-id": "trace-frontdoor-123"})
+        request.state.perf_metrics = {}
+        context = ApiRequestContext.build(
+            request=request,
+            db=None,  # type: ignore[arg-type]
+            user=None,
+            api_key=None,
+            raw_body=b"{}",
+        )
+        assert "perf" not in context.extra
+
+        request_with_perf = _build_request(headers={"x-trace-id": "trace-frontdoor-456"})
+        request_with_perf.state.perf_metrics = {"pipeline": {"auth_ms": 3}}
+        context_with_perf = ApiRequestContext.build(
+            request=request_with_perf,
+            db=None,  # type: ignore[arg-type]
+            user=None,
+            api_key=None,
+            raw_body=b"{}",
+        )
+        assert context_with_perf.extra["perf"] == {"pipeline": {"auth_ms": 3}}
+        assert context_with_perf.perf_metrics == {"pipeline": {"auth_ms": 3}}
 
     @pytest.mark.asyncio
     async def test_ensure_json_body_async_loads_body_lazily(self) -> None: