chore(kv-router): split monolithic indexer.rs into indexer/ directory (#6870)

Signed-off-by: PeaBrane <yanrpei@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

lib/kv-router/src/zmq_wire.rs

@@ -58,7 +58,7 @@ pub enum BlockHashValue {
 impl BlockHashValue {
     pub fn into_u64(self) -> u64 {
         match self {
-            BlockHashValue::Signed(v) => v as u64,
+            BlockHashValue::Signed(v) => v.cast_unsigned(),
             BlockHashValue::Unsigned(v) => v,
         }
     }

lib/llm/src/kv_router/jetstream.rs

@@ -303,7 +303,9 @@ pub(crate) async fn start_kv_router_background(
         let jitter_ms =
             rand::rng().random_range(-CHECK_INTERVAL_JITTER_MS..=CHECK_INTERVAL_JITTER_MS);
         let interval_duration = Duration::from_millis(
-            (CHECK_INTERVAL_BASE.as_millis() as i64 + jitter_ms).max(1) as u64,
+            (CHECK_INTERVAL_BASE.as_millis() as i64 + jitter_ms)
+                .max(1)
+                .cast_unsigned(),
         );
         let mut check_interval = tokio::time::interval(interval_duration);
         check_interval.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Skip);

lib/llm/src/kv_router/prefill_router.rs

@@ -135,7 +135,7 @@ impl PrefillRouter {
         })
     }
 
-    #[allow(clippy::too_many_arguments)]
+    #[expect(clippy::too_many_arguments)]
     pub fn new(
         activation_rx: oneshot::Receiver<Endpoint>,
         model_manager: Arc<ModelManager>,
@@ -335,7 +335,7 @@ impl PrefillRouter {
         let host = endpoint.bootstrap_host?;
         let port = endpoint.bootstrap_port?;
 
-        let bootstrap_room: u64 = rand::random_range(0..=i64::MAX as u64);
+        let bootstrap_room: u64 = rand::random_range(0..=i64::MAX.cast_unsigned());
 
         tracing::debug!(
             worker_id = worker_id,

lib/llm/src/kv_router/publisher.rs

@@ -646,7 +646,7 @@ pub async fn start_zmq_listener(
     }
 
     let mut consecutive_errors = 0u32;
-    #[allow(unused_assignments)]
+    #[expect(unused_assignments)]
     let mut exit_reason = "unknown";
     let mut messages_processed = 0u64;
 
@@ -730,7 +730,7 @@ pub async fn start_zmq_listener(
                     batch.data_parallel_rank.unwrap_or(0)
                 );
 
-                let dp_rank = batch.data_parallel_rank.unwrap_or(0) as u32;
+                let dp_rank = batch.data_parallel_rank.unwrap_or(0).cast_unsigned();
                 for raw_event in batch.events.into_iter() {
                     // Use shared monotonic event_id counter instead of engine's sequence number
                     let event_id = next_event_id.fetch_add(1, Ordering::SeqCst);
@@ -1964,7 +1964,7 @@ mod test_exponential_backoff {
     }
 
     #[test]
-    #[allow(clippy::assertions_on_constants)]
+    #[expect(clippy::assertions_on_constants)]
     fn test_backoff_constants_are_sane() {
         // Verify our constants make sense together
         assert!(INITIAL_BACKOFF_MS > 0);

lib/llm/src/kv_router/scheduler.rs

@@ -147,7 +147,7 @@ impl KvScheduler {
         })
     }
 
-    #[allow(clippy::too_many_arguments)]
+    #[expect(clippy::too_many_arguments)]
     pub async fn schedule(
         &self,
         maybe_request_id: Option<String>,