✨ Enhance logging configuration by introducing file output options and rotation settings in config.dev.toml. Update logger implementation to support multiple output streams, including file logging with rotation using lumberjack. Improve error handling and logging across various components, ensuring consistent logging practices. Update .gitignore to include log files and compressed logs. Add new Go module dependency for lumberjack.

internal/app/processor.go

@@ -150,6 +150,12 @@ func (p *MessageProcessor) Handle(ctx context.Context, raw []byte, msgID string)
 		latency := parsed.ParsedAt.Sub(receivedAt)
 		p.telemetry.RecordFailure("repository")
 		p.telemetry.RecordProcessingResult(ctx, string(parsed.Status), parsed.Category, latency)
+		// Log business layer failure with message context (Repository layer already logged technical error)
+		msgLogger.Error("Failed to persist parsed message",
+			zap.String("status", string(parsed.Status)),
+			zap.Duration("latency", latency),
+			zap.Error(err),
+		)
 		return fmt.Errorf("failed to insert message: %w", err)
 	}
 
@@ -202,11 +208,11 @@ func (p *MessageProcessor) persistRaw(ctx context.Context, msg *dto.ParsedTelegr
 		msg.ReceivedAt = time.Now()
 	}
 	if err := p.repository.InsertRaw(ctx, msg); err != nil {
-		p.logger.Error("Failed to persist raw telegram",
-			zap.String("message_id", msg.MessageID),
-			zap.String("status", string(msg.Status)),
-			zap.Error(err),
-		)
+		// Error already logged in Repository.InsertRaw, no need to log again
+		// Just add event to span if recording
+		if span := trace.SpanFromContext(ctx); span.IsRecording() {
+			span.RecordError(err)
+		}
 	} else {
 		if span := trace.SpanFromContext(ctx); span.IsRecording() {
 			span.AddEvent("raw telegram persisted",