fix(dash-spv): resolve clippy manual_is_multiple_of warnings

Replace manual modulo checks with is_multiple_of() method:
- client/mod.rs: Progress logging every 50,000 headers
- storage/disk.rs: Periodic segment saves every 1,000 headers
- chain/checkpoint_test.rs: Masternode list generation every 100,000 blocks
- storage/sync_state.rs: Height interval checking
- sync/headers.rs: Progress logging every 10,000 headers
- sync/headers_with_reorg.rs: Progress logging every 50,000 headers

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: PastaPastaPasta

dash-spv/src/chain/checkpoint_test.rs

@@ -22,7 +22,7 @@ mod tests {
             target: Target::from_compact(CompactTarget::from_consensus(0x1d00ffff)),
             merkle_root: Some(BlockHash::from_raw_hash(hash_bytes)),
             chain_work: format!("0x{:064x}", height * 1000),
-            masternode_list_name: if height % 100000 == 0 && height > 0 {
+            masternode_list_name: if height.is_multiple_of(100000) && height > 0 {
                 Some(format!("ML{}__70230", height))
             } else {
                 None

dash-spv/src/client/mod.rs

@@ -1816,7 +1816,7 @@ impl<
             }
 
             // Progress logging for large header counts
-            if loaded_count % 50_000 == 0 || loaded_count == target_height {
+            if loaded_count.is_multiple_of(50_000) || loaded_count == target_height {
                 let elapsed = start_time.elapsed();
                 let headers_per_sec = loaded_count as f64 / elapsed.as_secs_f64();
                 tracing::info!(

dash-spv/src/storage/disk.rs

@@ -940,7 +940,7 @@ impl DiskStorageManager {
         drop(cached_tip);
 
         // Save dirty segments periodically (every 1000 headers)
-        if headers.len() >= 1000 || blockchain_height % 1000 == 0 {
+        if headers.len() >= 1000 || blockchain_height.is_multiple_of(1000) {
             self.save_dirty_segments().await?;
         }
 

dash-spv/src/storage/sync_state.rs

@@ -344,7 +344,7 @@ impl PersistentSyncState {
             50000
         };
 
-        height % interval == 0
+        height.is_multiple_of(interval)
     }
 }
 

dash-spv/src/sync/headers.rs

@@ -94,7 +94,7 @@ impl HeaderSyncManager {
             None => true,
             Some(last_time) => {
                 last_time.elapsed() >= std::time::Duration::from_secs(30)
-                    || self.total_headers_synced % 10000 == 0
+                    || self.total_headers_synced.is_multiple_of(10000)
             }
         };
 
@@ -407,7 +407,7 @@ impl HeaderSyncManager {
 
         // Headers request sent successfully
 
-        if self.total_headers_synced % 10000 == 0 {
+        if self.total_headers_synced.is_multiple_of(10000) {
             tracing::debug!("Requested headers starting from {:?}", base_hash);
         }
 

dash-spv/src/sync/headers_with_reorg.rs

@@ -205,7 +205,7 @@ impl<S: StorageManager + Send + Sync + 'static, N: NetworkManager + Send + Sync
             }
 
             // Progress logging
-            if loaded_count % 50_000 == 0 || loaded_count == tip_height {
+            if loaded_count.is_multiple_of(50_000) || loaded_count == tip_height {
                 let elapsed = start_time.elapsed();
                 let headers_per_sec = loaded_count as f64 / elapsed.as_secs_f64();
                 tracing::info!(