fix: standardize log prefixes, remove duplicates, add missing module tags

Second-pass logging cleanup: consistent [LEVEL] [module] format across
all 41 files. Remove stale prefixes ([CF], [SYNC], [SCHED], [API],
[STORAGE], [HEALTH], [ROLLBACK]). Remove 5 duplicate log lines. Gate
ungated DEBUG lines. Fix wrong log levels (restore start WARN→INFO).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

controller/internal/metrics/telemetry.go

@@ -39,7 +39,7 @@ func (s *MetricsStore) GetContainerTelemetry(since time.Time) ([]ContainerTeleme
 		var ct ContainerTelemetry
 		if err := rows.Scan(&ct.ContainerName, &ct.MemoryAvgMB, &ct.MemoryPeakMB,
 			&ct.CPUAvgPercent, &ct.SampleCount); err != nil {
-			log.Printf("[WARN] telemetry row scan failed: %v", err)
+			log.Printf("[WARN] [metrics] telemetry row scan failed: %v", err)
 			continue
 		}
 		results = append(results, ct)