feat(codex-image): 封装 GPT Image 2 图片接口并收紧错误处理

- 新增 openai:image 路由、planner 与 finalize，内部通过 Codex responses image_generation tool 执行生图

- 补充 Codex OAuth/header 兼容、图片 success report 本地处理与相关前后端/集成测试

- 禁止 chat/completions 使用 gpt-image-2，图片接口限制 n=1，并移除 Provider 模型页的图片能力开关

apps/aether-gateway/src/usage/reporting/context.rs

@@ -1,6 +1,7 @@
 use aether_data_contracts::repository::video_tasks::VideoTaskLookupKey;
 use aether_usage_runtime::build_locally_actionable_report_context_from_video_task;
 use serde_json::Value;
+use tokio::time::{sleep, Duration};
 
 use crate::request_candidate_runtime::resolve_locally_actionable_request_candidate_report_context;
 use crate::video_tasks::{resolve_video_task_report_lookup, VideoTaskReportLookup};
@@ -8,6 +9,9 @@ use crate::AppState;
 
 pub(crate) use aether_usage_runtime::report_context_is_locally_actionable;
 
+const REQUEST_CANDIDATE_REPORT_CONTEXT_RETRY_ATTEMPTS: usize = 5;
+const REQUEST_CANDIDATE_REPORT_CONTEXT_RETRY_DELAY_MS: u64 = 50;
+
 pub(crate) async fn resolve_locally_actionable_report_context(
     state: &AppState,
     report_context: Option<&Value>,
@@ -18,7 +22,8 @@ pub(crate) async fn resolve_locally_actionable_report_context(
     }
 
     if let Some(resolved) =
-        resolve_locally_actionable_request_candidate_report_context(state, &context).await
+        resolve_locally_actionable_request_candidate_report_context_with_retry(state, &context)
+            .await
     {
         return Some(resolved);
     }
@@ -28,7 +33,8 @@ pub(crate) async fn resolve_locally_actionable_report_context(
         .unwrap_or(context);
 
     if let Some(resolved) =
-        resolve_locally_actionable_request_candidate_report_context(state, &context).await
+        resolve_locally_actionable_request_candidate_report_context_with_retry(state, &context)
+            .await
     {
         return Some(resolved);
     }
@@ -36,6 +42,38 @@ pub(crate) async fn resolve_locally_actionable_report_context(
     report_context_is_locally_actionable(Some(&context)).then_some(context)
 }
 
+async fn resolve_locally_actionable_request_candidate_report_context_with_retry(
+    state: &AppState,
+    context: &Value,
+) -> Option<Value> {
+    if context
+        .get("request_id")
+        .and_then(Value::as_str)
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .is_none()
+    {
+        return None;
+    }
+
+    for attempt in 0..=REQUEST_CANDIDATE_REPORT_CONTEXT_RETRY_ATTEMPTS {
+        if let Some(resolved) =
+            resolve_locally_actionable_request_candidate_report_context(state, context).await
+        {
+            return Some(resolved);
+        }
+
+        if attempt < REQUEST_CANDIDATE_REPORT_CONTEXT_RETRY_ATTEMPTS {
+            sleep(Duration::from_millis(
+                REQUEST_CANDIDATE_REPORT_CONTEXT_RETRY_DELAY_MS,
+            ))
+            .await;
+        }
+    }
+
+    None
+}
+
 async fn resolve_locally_actionable_report_context_from_video_task(
     state: &AppState,
     context: &Value,