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

crates/aether-executor/src/error.rs

@@ -1,6 +1,54 @@
+use std::error::Error as _;
+
 use http::method::InvalidMethod;
 use thiserror::Error;
 
+pub(crate) fn format_upstream_request_error(err: &reqwest::Error) -> String {
+    let mut kinds = Vec::new();
+    if err.is_connect() {
+        kinds.push("connect");
+    }
+    if err.is_timeout() {
+        kinds.push("timeout");
+    }
+    if err.is_redirect() {
+        kinds.push("redirect");
+    }
+    if err.is_body() {
+        kinds.push("body");
+    }
+    if err.is_decode() {
+        kinds.push("decode");
+    }
+    if err.is_request() {
+        kinds.push("request");
+    }
+
+    let mut detail = err.to_string();
+    let mut source = err.source();
+    while let Some(cause) = source {
+        let cause_text = cause.to_string();
+        if !cause_text.is_empty() && !detail.contains(&cause_text) {
+            detail.push_str(": ");
+            detail.push_str(&cause_text);
+        }
+        source = cause.source();
+    }
+
+    if let Some(url) = err.url() {
+        detail.push_str(" [url=");
+        detail.push_str(url.as_str());
+        detail.push(']');
+    }
+    if !kinds.is_empty() {
+        detail.push_str(" [kind=");
+        detail.push_str(&kinds.join(","));
+        detail.push(']');
+    }
+
+    detail
+}
+
 #[derive(Debug, Error)]
 pub enum ExecutorClientError {
     #[error("executor endpoint is not configured")]
@@ -46,7 +94,7 @@ pub enum ExecutorServiceError {
     #[error("executor overloaded: gate {gate} saturated at {limit}")]
     Overloaded { gate: &'static str, limit: usize },
     #[error("failed to execute upstream request: {0}")]
-    UpstreamRequest(reqwest::Error),
+    UpstreamRequest(String),
     #[error("hub relay request failed: {0}")]
     RelayError(String),
     #[error("upstream response is not valid JSON: {0}")]

crates/aether-executor/src/service.rs

@@ -14,7 +14,7 @@ use reqwest::tls::Version;
 use serde::Serialize;
 use serde_json::Value;
 
-use crate::ExecutorServiceError;
+use crate::{error::format_upstream_request_error, ExecutorServiceError};
 
 const HUB_RELAY_CONTENT_TYPE: &str = "application/vnd.aether.tunnel-envelope";
 const HUB_RELAY_ERROR_HEADER: &str = "x-aether-tunnel-error";
@@ -57,10 +57,9 @@ impl SyncExecutor {
         let response = send_request(&plan, body_bytes).await?;
         let status_code = response.status().as_u16();
         let headers = collect_response_headers(response.headers());
-        let body_bytes = response
-            .bytes()
-            .await
-            .map_err(ExecutorServiceError::UpstreamRequest)?;
+        let body_bytes = response.bytes().await.map_err(|err| {
+            ExecutorServiceError::UpstreamRequest(format_upstream_request_error(&err))
+        })?;
         let elapsed_ms = started_at.elapsed().as_millis() as u64;
         let upstream_bytes = body_bytes.len() as u64;
 
@@ -160,7 +159,7 @@ async fn send_request(
     request
         .send()
         .await
-        .map_err(ExecutorServiceError::UpstreamRequest)
+        .map_err(|err| ExecutorServiceError::UpstreamRequest(format_upstream_request_error(&err)))
 }
 
 async fn send_via_tunnel_relay(