fix(ja4ebpf): split bpf2go generate into Ja4Tc + Ja4Ssl, fix RPM systemd-rpm-macros

- Use two separate //go:generate directives (Ja4Tc for tc_capture.c, Ja4Ssl
  for uprobe_ssl.c) to avoid duplicate LICENSE symbol and multi-file clang issue
- Update loader.go to hold tcObjs/sslObjs separately with correct field names:
  UprobeSslSetFd, UprobeSslReadEntry, UretprobeSslReadExit,
  KprobeAccept4Entry, KretprobeAccept4Exit
- Add systemd-rpm-macros to all three RPM build stages (el8/el9/el10)
  so that %{_unitdir} macro resolves correctly
- RPMs now build successfully for el8, el9, el10

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

old/services/sentinel/Dockerfile.test-server

@@ -0,0 +1,105 @@
+# Test server for generating TLS traffic in integration tests
+FROM golang:1.23-alpine
+
+WORKDIR /app
+
+# Create a simple TLS server for testing
+RUN cat > main.go << 'EOF'
+package main
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"flag"
+	"fmt"
+	"log"
+	"math/big"
+	"net"
+	"net/http"
+	"time"
+)
+
+func main() {
+	port := flag.String("port", "8443", "Port to listen on")
+	flag.Parse()
+
+	// Generate self-signed certificate
+	cert, err := generateSelfSignedCert()
+	if err != nil {
+		log.Fatalf("Failed to generate certificate: %v", err)
+	}
+
+	config := &tls.Config{
+		Certificates: []tls.Certificate{cert},
+		MinVersion:   tls.VersionTLS12,
+	}
+
+	listener, err := tls.Listen("tcp", ":"+*port, config)
+	if err != nil {
+		log.Fatalf("Failed to start TLS listener: %v", err)
+	}
+	defer listener.Close()
+
+	log.Printf("TLS test server listening on port %s", *port)
+
+	http.Serve(listener, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte("Hello from TLS test server"))
+	}))
+}
+
+func generateSelfSignedCert() (tls.Certificate, error) {
+	// Generate private key
+	priv, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return tls.Certificate{}, err
+	}
+
+	// Create certificate template
+	template := x509.Certificate{
+		SerialNumber: big.NewInt(1),
+		Subject: pkix.Name{
+			Organization: []string{"JA4Sentinel Test"},
+			CommonName:   "localhost",
+		},
+		NotBefore:             time.Now(),
+		NotAfter:              time.Now().Add(24 * time.Hour),
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+		IPAddresses:           []net.IP{net.IPv4(127, 0, 0, 1), net.IPv6loopback},
+		DNSNames:              []string{"localhost"},
+	}
+
+	// Create certificate
+	certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv)
+	if err != nil {
+		return tls.Certificate{}, err
+	}
+
+	// Encode certificate
+	certPEM := pem.EncodeToMemory(&pem.Block{
+		Type:  "CERTIFICATE",
+		Bytes: certDER,
+	})
+
+	// Encode private key
+	keyPEM := pem.EncodeToMemory(&pem.Block{
+		Type:  "RSA PRIVATE KEY",
+		Bytes: x509.MarshalPKCS1PrivateKey(priv),
+	})
+
+	// Load certificate
+	return tls.X509KeyPair(certPEM, keyPEM)
+}
+EOF
+
+RUN go mod init test-server && go mod tidy
+
+EXPOSE 8443
+
+CMD ["go", "run", "main.go", "-port", "8443"]