fix: implement block_count and worker_count for CRTC (#8559)

Signed-off-by: Hannah Zhang <hannahz@nvidia.com>

lib/kv-router/src/indexer/concurrent_radix_tree.rs

@@ -712,6 +712,17 @@ impl SyncIndexer for ConcurrentRadixTree {
         cleanup_guard.mark_completed();
     }
 
+    fn worker_count(&self) -> usize {
+        self.tree_sizes.len()
+    }
+
+    fn block_count(&self) -> usize {
+        self.tree_sizes
+            .iter()
+            .map(|e| e.value().load(Ordering::Relaxed))
+            .sum()
+    }
+
     fn dump_events(&self) -> Option<Vec<RouterEvent>> {
         Some(self.dump_tree_as_events())
     }

lib/kv-router/src/indexer/concurrent_radix_tree_compressed.rs

@@ -1388,6 +1388,17 @@ impl SyncIndexer for ConcurrentRadixTreeCompressed {
         cleanup_guard.mark_completed();
     }
 
+    fn worker_count(&self) -> usize {
+        self.tree_sizes.len()
+    }
+
+    fn block_count(&self) -> usize {
+        self.tree_sizes
+            .iter()
+            .map(|e| e.value().load(Ordering::Relaxed))
+            .sum()
+    }
+
     fn dump_events(&self) -> Option<Vec<RouterEvent>> {
         Some(self.dump_tree_as_events())
     }

lib/kv-router/src/indexer/positional.rs

@@ -190,6 +190,17 @@ impl SyncIndexer for PositionalIndexer {
     fn find_matches(&self, sequence: &[LocalBlockHash], early_exit: bool) -> OverlapScores {
         self.jump_search_matches(sequence, early_exit)
     }
+
+    fn worker_count(&self) -> usize {
+        self.tree_sizes.len()
+    }
+
+    fn block_count(&self) -> usize {
+        self.tree_sizes
+            .iter()
+            .map(|e| e.value().load(Ordering::Relaxed))
+            .sum()
+    }
 }
 
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