feat: challenge registry-driven platform + XVI/XVII imports + admin toggle + domain rename

- Rename repo/domain: attack-defense-platform / attackdefense.imrnes.team (all refs replaced)
- challenge_registry.json: single source of truth (28 challs across gemastik18/xvi/xvii)
- teams.py: registry-driven CHALLENGES, set_challenge_enabled, sync_challenge_runtime
  (apply enable/disable to live teams: build/up or stop/remove + receiver restart)
- compose_gen.py: render per-team compose from canonical per-challenge templates
  (image reuse, per-team ports 30xxx, flag mounts, passwords)
- gen_canonical_composes.py: canonical docker-compose.yml for all services
- import_new_challenges.py: import XVI/XVII services + EOL base image fixes
  (debian:buster→bookworm, node:14→20, python:3.7-slim→3.11)
- receiver: xvi package (10 checkers) + xvii package (12 generic checkers),
  Challenge base reads PASSWORD_<team_port> from env; gen_receiver_main.py
  generates per-team main.py from registry
- main.py: /api/challenges returns full registry; PATCH /api/challenges/<name>
  toggles enabled + applies to live teams
- index.html: 🏗️ Challenge Manager tab (toggle per challenge, grouped by set)
- SLA bonus now dynamic (all enabled challenges, not hardcoded 6)

services/back-to-basic/ctf.xinetd

@@ -0,0 +1,18 @@
+service ctf
+{
+    disable = no
+    socket_type = stream
+    protocol    = tcp
+    wait        = no
+    user        = root
+    type        = UNLISTED
+    port        = 8000
+    bind        = 0.0.0.0
+    server      = /bin/sh
+    server_args = /ctf/start.sh
+    banner_fail = /etc/banner_fail
+    # safety options
+    per_source  = 10 # the maximum instances of this service per source IP address
+    rlimit_cpu  = 1 # the maximum number of CPU seconds that the service may use
+    #rlimit_as  = 1024M # the Address Space resource limit for the service
+}