chore: version 1.0.7 - add log levels

- Add configurable log levels: DEBUG, INFO, WARN, ERROR
- Replace debug.enabled with log.level in configuration
- Add Warn/Warnf methods for warning messages
- Log orphan events and buffer overflow as WARN
- Log parse errors as WARN
- Log raw events and correlations as DEBUG

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

internal/adapters/inbound/unixsocket/source.go

@@ -13,6 +13,7 @@ import (
 	"time"
 
 	"github.com/logcorrelator/logcorrelator/internal/domain"
+	"github.com/logcorrelator/logcorrelator/internal/observability"
 )
 
 const (
@@ -41,6 +42,7 @@ type UnixSocketSource struct {
 	wg        sync.WaitGroup
 	semaphore chan struct{} // Limit concurrent connections
 	stopOnce  sync.Once
+	logger    *observability.Logger
 }
 
 // NewUnixSocketSource creates a new Unix socket source.
@@ -49,9 +51,15 @@ func NewUnixSocketSource(config Config) *UnixSocketSource {
 		config:    config,
 		done:      make(chan struct{}),
 		semaphore: make(chan struct{}, MaxConcurrentConnections),
+		logger:    observability.NewLogger("unixsocket:" + config.Name),
 	}
 }
 
+// SetLogger sets the logger for the source (for debug mode).
+func (s *UnixSocketSource) SetLogger(logger *observability.Logger) {
+	s.logger = logger.WithFields(map[string]any{"source": s.config.Name})
+}
+
 // Name returns the source name.
 func (s *UnixSocketSource) Name() string {
 	return s.config.Name
@@ -166,10 +174,15 @@ func (s *UnixSocketSource) readEvents(ctx context.Context, conn net.Conn, eventC
 
 		event, err := parseJSONEvent(line, s.config.SourceType)
 		if err != nil {
-			// Log parse errors but continue processing
+			// Log parse errors as warnings
+			s.logger.Warnf("parse error: %v", err)
 			continue
 		}
 
+		// Debug: log raw events
+		s.logger.Debugf("event received: source=%s src_ip=%s src_port=%d", 
+			event.Source, event.SrcIP, event.SrcPort)
+
 		select {
 		case eventChan <- event:
 		case <-ctx.Done():