chore: remove remaining Issue# references from code

Removed issue numbering from inline comments in:
- src/proxy/ws.rs:171 - Changed 'Issue #5 fix' to descriptive comment
- tests/steps/integration_steps.rs:1345 - Changed 'Issue #2 and #5' to descriptive header

All Issue# references now removed from code files (only remain in documentation).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: pamungkaski

src/proxy/ws.rs

@@ -168,7 +168,7 @@ async fn health_monitor(
         let node_name = current_node_name.lock().await.clone();
         let current_healthy = is_node_healthy(&state, &node_name).await;
 
-        // ✅ Check if better node available (Issue #5 fix)
+        // Check if a better node is available (prioritizes primary over backup)
         if let Some((best_name, best_url)) = select_healthy_node(&state).await {
             // Reconnect if better node available (different name)
             // This handles both:

tests/steps/integration_steps.rs

@@ -1342,7 +1342,8 @@ async fn no_websocket_errors(world: &mut IntegrationWorld) {
 }
 
 // ============================================================================
-// Phase 0 Critical Test Step Definitions (Issue #2 and #5)
+// WebSocket Reconnection Test Step Definitions
+// Tests subscription ID preservation and primary node failback
 // ============================================================================
 
 #[when("I send eth_blockNumber over WebSocket and receive response")]