feat: add adaptive pool metrics and self-check

apps/aether-gateway/src/execution_runtime/sync/execution.rs

@@ -59,6 +59,7 @@ use crate::orchestration::{
     LocalExecutionEffect, LocalExecutionEffectContext, LocalHealthFailureEffect,
     LocalHealthSuccessEffect, LocalOAuthInvalidationEffect, LocalPoolErrorEffect,
 };
+use crate::provider_pool_demand::acquire_provider_pool_in_flight_guard;
 use crate::request_candidate_runtime::{
     ensure_execution_request_candidate_slot, record_local_request_candidate_extra_data,
     record_local_request_candidate_status,
@@ -1066,6 +1067,14 @@ async fn execute_execution_runtime_sync_impl(
         },
     )
     .await;
+    let _provider_pool_in_flight_guard = acquire_provider_pool_in_flight_guard(
+        state.runtime_state.clone(),
+        &plan.provider_id,
+        plan_request_id.as_str(),
+        plan_candidate_id.as_deref(),
+        key_id.as_str(),
+    )
+    .await;
     #[cfg(not(test))]
     let mut result = {
         match maybe_execute_chatgpt_web_image_sync(state, &plan, report_context.as_ref()).await {