fix(metrics): make runtime_can_publish_metrics test more robust

- Wait for 4 finalized blocks instead of 2 (more time for bitfield processing)
- Add retry loop (3 attempts, 2s delay) for metric propagation through wasm tracing
- Replace bare unwrap() with descriptive assertion message
- Lower threshold from > 1 to > 0 for bitfield counter
- Print available teyrchain/pezkuwi metrics on failure for diagnostics

pezkuwi/node/metrics/src/tests.rs

@@ -53,17 +53,46 @@ async fn runtime_can_publish_metrics() {
 	// Start validator Bob.
 	let _bob = run_validator_node(bob_config, None).await;
 
-	// Wait for Alice to see two finalized blocks.
-	alice.wait_for_finalized_blocks(2).await;
+	// Wait for enough finalized blocks so that bitfields are processed.
+	// With 2 validators, we need several blocks for the inherent data pipeline
+	// to produce and process availability bitfields.
+	alice.wait_for_finalized_blocks(4).await;
 
 	let metrics_uri = format!("http://localhost:{}/metrics", DEFAULT_PROMETHEUS_PORT);
-	let metrics = scrape_prometheus_metrics(&metrics_uri).await;
+	let metric_name = TEYRCHAIN_INHERENT_DATA_BITFIELDS_PROCESSED.name.to_owned();
 
-	// There should be at least 1 bitfield processed by now.
+	// Retry scraping a few times — the metric may take a moment to propagate
+	// through the wasm tracing pipeline after blocks are finalized.
+	let mut metrics = HashMap::new();
+	for attempt in 0..3 {
+		metrics = scrape_prometheus_metrics(&metrics_uri).await;
+		if metrics.get(&metric_name).copied().unwrap_or(0) > 0 {
+			break;
+		}
+		if attempt < 2 {
+			tokio::time::sleep(std::time::Duration::from_secs(2)).await;
+		}
+	}
+
+	// Print all pezkuwi_teyrchain metrics for diagnostics on failure.
+	let teyrchain_metrics: Vec<_> = metrics
+		.iter()
+		.filter(|(k, _)| k.contains("teyrchain") || k.contains("pezkuwi"))
+		.collect();
+	eprintln!("Available teyrchain/pezkuwi metrics ({}):", teyrchain_metrics.len());
+	for (k, v) in &teyrchain_metrics {
+		eprintln!("  {} = {}", k, v);
+	}
+
+	let bitfields_value = metrics.get(&metric_name).copied().unwrap_or(0);
 	assert!(
-		*metrics
-			.get(&TEYRCHAIN_INHERENT_DATA_BITFIELDS_PROCESSED.name.to_owned())
-			.unwrap() > 1
+		bitfields_value > 0,
+		"Expected metric '{}' to be > 0 but got {}. \
+		 Total metrics scraped: {}. Teyrchain metrics found: {}.",
+		metric_name,
+		bitfields_value,
+		metrics.len(),
+		teyrchain_metrics.len(),
 	);
 }