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/packaging/systemd/ja4sentinel.service

@@ -0,0 +1,41 @@
+[Unit]
+Description=JA4 client fingerprinting daemon
+Documentation=https://github.com/your-repo/ja4sentinel
+After=network.target
+Wants=network-online.target
+
+[Service]
+Type=notify
+User=root
+Group=root
+WorkingDirectory=/var/lib/ja4sentinel
+ExecStart=/usr/bin/ja4sentinel --config /etc/ja4sentinel/config.yml
+ExecReload=/bin/kill -HUP $MAINPID
+Restart=on-failure
+RestartSec=5
+WatchdogSec=30
+TimeoutStopSec=2
+NotifyAccess=main
+
+# Security hardening (compatible with root for packet capture)
+ProtectSystem=strict
+ProtectHome=yes
+PrivateTmp=yes
+ProtectKernelTunables=yes
+ProtectKernelModules=yes
+ProtectControlGroups=yes
+RestrictRealtime=yes
+RestrictSUIDSGID=yes
+LockPersonality=yes
+ReadWritePaths=/var/lib/ja4sentinel /var/log/ja4sentinel
+
+# Capabilities for packet capture (inherited by root)
+AmbientCapabilities=CAP_NET_RAW CAP_NET_ADMIN
+CapabilityBoundingSet=CAP_NET_RAW CAP_NET_ADMIN
+
+# Resource limits
+LimitNOFILE=65536
+LimitNPROC=64
+
+[Install]
+WantedBy=multi-user.target