fix: improve error logging with source/destination details

Logging improvements:
- Add src_ip, src_port, dst_ip, dst_port to tlsparse error logs
- Add connection details to fingerprint error logs (conn_id, payload_len)
- Include 'unknown' placeholders for packets that fail before parsing

This helps debug issues with truncated ClientHello payloads
and identify problematic connections more easily.

Example log output:
  WARN Failed to generate fingerprints
    src_ip=192.168.1.10 src_port=54321 dst_ip=10.0.0.1 dst_port=443
    conn_id=192.168.1.10:54321->10.0.0.1:443 payload_len=128
    error="failed to parse ClientHello: extension data truncated"

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

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

cmd/ja4sentinel/main.go

@@ -167,7 +167,11 @@ func main() {
 				clientHello, err := parser.Process(pkt)
 				if err != nil {
 					appLogger.Warn("tlsparse", "Failed to parse TLS ClientHello", map[string]string{
-						"error": err.Error(),
+						"error":    err.Error(),
+						"src_ip":   "unknown",
+						"src_port": "unknown",
+						"dst_ip":   "unknown",
+						"dst_port": "unknown",
 					})
 					continue
 				}
@@ -186,7 +190,12 @@ func main() {
 				fingerprints, err := fingerprintEngine.FromClientHello(*clientHello)
 				if err != nil {
 					appLogger.Warn("fingerprint", "Failed to generate fingerprints", map[string]string{
-						"error": err.Error(),
+						"error":    err.Error(),
+						"src_ip":   clientHello.SrcIP,
+						"src_port": fmt.Sprintf("%d", clientHello.SrcPort),
+						"dst_ip":   clientHello.DstIP,
+						"dst_port": fmt.Sprintf("%d", clientHello.DstPort),
+						"conn_id":  clientHello.ConnID,
 					})
 					continue
 				}