fix: clear cache more regularly

Author: Ludo Galabru

components/chainhook-sdk/src/hord/db/mod.rs

@@ -794,15 +794,15 @@ pub async fn fetch_and_cache_blocks_in_hord_db(
         }
 
         if !traversals_cache.is_empty() {
-            if num_writes % 128 == 0 {
+            if num_writes % 16 == 0 {
                 ctx.try_log(|logger| {
                     slog::info!(
                         logger,
                         "Flushing traversals cache (#{} entries)",
                         traversals_cache.len()
                     );
                 });
-                traversals_cache.shrink_to_fit();
+                traversals_cache.clear();
             }
         }