feat: multi-distro VM tests, ja4ebpf eBPF improvements, bot-detector scoring

ja4ebpf:
- Refactor BPF TC capture with improved SYN offset handling and TCP option parsing
- Enhance TLS uprobe SSL hooking for better key extraction
- Add ClickHouse writer improvements for HTTP log materialized views
- Update RPM spec for Rocky Linux 8/9/10, fix systemd service
- Simplify loader with cleaner bpf2go integration

bot-detector:
- Add H2 SETTINGS per-parameter comparison in browser_matcher
- Enhance browser signatures and scoring pipeline
- Improve preprocessing and cycle detection

infra:
- Multi-distro Vagrantfile (centos8, rocky9, rocky10) with per-distro provisioning
- New Makefile targets: vm-up-all, test-vm-matrix, test-vm-centos8/rocky10
- Add debug helpers and run-test-from-host.sh for host-driven VM testing
- Update run-tests-vm.sh for cross-distro compatibility
- Remove accidental binary blob (\004)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

services/ja4ebpf/packaging/systemd/ja4ebpf.service

@@ -23,7 +23,8 @@ Type=simple
 User=ja4ebpf
 Group=ja4ebpf
 
-ExecStart=/usr/sbin/ja4ebpf -config /etc/ja4ebpf/config.yml
+ExecStart=/usr/sbin/ja4ebpf
+Environment=JA4EBPF_CONFIG=/etc/ja4ebpf/config.yml
 ExecReload=/bin/kill -HUP $MAINPID
 Restart=on-failure
 RestartSec=5s