fix(provider): 将rust分支的gemini cli端点行为对齐到python分支 (#321)

* fix(provider): 对齐 Vertex/Gemini 上游发包与 Python master

- provider-transport: 为 custom+aiplatform 推断 Vertex API key 上下文并统一 URL 构建顺序，复用共享 request_url 构建最终上游地址
- ai-pipeline/gateway: Vertex Gemini 路径改为仅使用 URL query key，不再向上游附带 x-goog-api-key header；同步对齐 standard/admin/test-connection/runtime miss 摘要中的最终 URL
- gemini conversion: 按 Python master 输出 Gemini 请求体，补齐 system_instruction / generation_config / tool_config / function_declarations 形态，并移植 Gemini schema 清洗逻辑
- scheduler/executor: 将最终 upstream_url、mapped_model、key_name 写入候选 extra_data，运行时 miss 诊断优先展示真实展开后的上游 URL 便于服务器排障

* fix(provider): 修复 Vertex provider 测试与本地调度链路

* fix(provider): 对齐 Vertex 本地执行与 Rust CI

crates/aether-scheduler-core/src/request_candidate.rs

@@ -17,6 +17,9 @@ pub struct SchedulerRequestCandidateReportContext {
     pub key_id: Option<String>,
     pub client_api_format: Option<String>,
     pub provider_api_format: Option<String>,
+    pub upstream_url: Option<String>,
+    pub mapped_model: Option<String>,
+    pub key_name: Option<String>,
     pub proxy: Option<Value>,
 }
 
@@ -103,6 +106,9 @@ pub fn parse_request_candidate_report_context(
         key_id: string_field(report_context, "key_id"),
         client_api_format: string_field(report_context, "client_api_format"),
         provider_api_format: string_field(report_context, "provider_api_format"),
+        upstream_url: string_field(report_context, "upstream_url"),
+        mapped_model: string_field(report_context, "mapped_model"),
+        key_name: string_field(report_context, "key_name"),
         proxy: report_context
             .get("proxy")
             .cloned()
@@ -129,11 +135,20 @@ pub fn resolve_report_request_candidate_slot(
         key_id,
         client_api_format,
         provider_api_format,
+        upstream_url,
+        mapped_model,
+        key_name,
         proxy,
     } = metadata;
     let request_id = request_id?;
-    let synthesized_extra_data =
-        build_report_candidate_extra_data(client_api_format, provider_api_format, proxy);
+    let synthesized_extra_data = build_report_candidate_extra_data(
+        client_api_format,
+        provider_api_format,
+        upstream_url,
+        mapped_model,
+        key_name,
+        proxy,
+    );
     let created_at_unix_ms = matched_candidate
         .as_ref()
         .map(|candidate| candidate.created_at_unix_ms)
@@ -489,9 +504,12 @@ fn next_candidate_index(candidates: &[StoredRequestCandidate]) -> u32 {
 fn build_report_candidate_extra_data(
     client_api_format: Option<String>,
     provider_api_format: Option<String>,
+    upstream_url: Option<String>,
+    mapped_model: Option<String>,
+    key_name: Option<String>,
     proxy: Option<Value>,
 ) -> Option<Value> {
-    let mut extra_data = Map::with_capacity(5);
+    let mut extra_data = Map::with_capacity(8);
     extra_data.insert("gateway_execution_runtime".to_string(), Value::Bool(true));
     extra_data.insert("phase".to_string(), Value::String("3c_trial".to_string()));
     if let Some(client_api_format) = client_api_format {
@@ -506,6 +524,15 @@ fn build_report_candidate_extra_data(
             Value::String(provider_api_format),
         );
     }
+    if let Some(upstream_url) = upstream_url {
+        extra_data.insert("upstream_url".to_string(), Value::String(upstream_url));
+    }
+    if let Some(mapped_model) = mapped_model {
+        extra_data.insert("mapped_model".to_string(), Value::String(mapped_model));
+    }
+    if let Some(key_name) = key_name {
+        extra_data.insert("key_name".to_string(), Value::String(key_name));
+    }
     if let Some(proxy) = proxy {
         extra_data.insert("proxy".to_string(), proxy);
     }