feat: complete M7 cutover preparation

server-rs/crates/api-server/src/config.rs

@@ -54,6 +54,7 @@ pub struct AppConfig {
     pub llm_request_timeout_ms: u64,
     pub llm_max_retries: u32,
     pub llm_retry_backoff_ms: u64,
+    pub slow_request_threshold_ms: u64,
 }
 
 impl Default for AppConfig {
@@ -104,6 +105,7 @@ impl Default for AppConfig {
             llm_request_timeout_ms: DEFAULT_REQUEST_TIMEOUT_MS,
             llm_max_retries: DEFAULT_MAX_RETRIES,
             llm_retry_backoff_ms: DEFAULT_RETRY_BACKOFF_MS,
+            slow_request_threshold_ms: 1_000,
         }
     }
 }
@@ -305,6 +307,12 @@ impl AppConfig {
             config.llm_retry_backoff_ms = llm_retry_backoff_ms;
         }
 
+        if let Some(slow_request_threshold_ms) =
+            read_first_positive_u64_env(&["GENARRATIVE_SLOW_REQUEST_THRESHOLD_MS"])
+        {
+            config.slow_request_threshold_ms = slow_request_threshold_ms;
+        }
+
         config
     }