Unify legacy data path /etc/xdp-blocker → /etc/xdp-defense

All config/data paths now use /etc/xdp-defense/ consistently,
eliminating the legacy xdp-blocker directory reference.

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

config/config.yaml

@@ -11,7 +11,7 @@ general:
 
 blocker:
   enabled: true
-  config_dir: /etc/xdp-blocker  # existing data path (blocklist, countries, whitelist)
+  config_dir: /etc/xdp-defense  # blocklist, countries, whitelist data
 
 rate_limits:
   default_pps: 2000        # packets per second threshold

config/xdp-defense.service

@@ -15,7 +15,7 @@ RestartSec=5
 
 # Security hardening
 ProtectSystem=strict
-ReadWritePaths=/var/lib/xdp-defense /etc/xdp-defense /etc/xdp-blocker /sys/fs/bpf /tmp
+ReadWritePaths=/var/lib/xdp-defense /etc/xdp-defense /sys/fs/bpf /tmp
 ProtectHome=true
 NoNewPrivileges=false
 CapabilityBoundingSet=CAP_NET_ADMIN CAP_BPF CAP_SYS_ADMIN CAP_PERFMON