Add Keycloak realm import and LDAP role groups

- Auto-import the clustercockpit realm on Keycloak start
- Rewrite the generated LDAP directory with cc-* role groups and dev users
- Move config.json to the main/nats/auth schema; cc-backend now on :8088
- Add resetDev.sh to tear down containers, volumes and generated data
- Bump cc-metric-store build image to golang 1.26.4
- Ignore all of data/ (generated by dataGenerationScript.sh)

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

resetDev.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+set -euo pipefail
+
+echo ""
+echo "|--------------------------------------------------------------------------------------|"
+echo "| cc-docker dev environment reset script                                               |"
+echo "| This will stop all containers, remove volumes, and delete all generated data.        |"
+echo "| After completion, re-run ./setupDev.sh to reinitialize.                              |"
+echo "|--------------------------------------------------------------------------------------|"
+echo ""
+
+read -p "This will delete all generated data and cannot be undone. Continue? [y/N] " -r
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+    echo "Aborted."
+    exit 0
+fi
+
+DOCKER_COMPOSE=""
+
+if docker-compose --version &>/dev/null 2>&1; then
+    DOCKER_COMPOSE="docker-compose"
+fi
+
+if docker compose version &>/dev/null 2>&1; then
+    DOCKER_COMPOSE="docker compose"
+fi
+
+if [[ -z "${DOCKER_COMPOSE}" ]]; then
+    echo "docker-compose not found!"
+    exit 1
+fi
+
+echo "Stopping containers and removing volumes..."
+$DOCKER_COMPOSE down --volumes --remove-orphans
+
+echo "Removing data directory..."
+if [ -d data ]; then
+    rm -rf data
+fi
+
+echo "Removing cc-backend generated files..."
+if [ -d cc-backend/var ]; then
+    rm -rf cc-backend/var
+fi
+if [ -f cc-backend/.env ]; then
+    rm cc-backend/.env
+fi
+if [ -f cc-backend/config.json ]; then
+    rm cc-backend/config.json
+fi
+
+echo ""
+echo "|--------------------------------------------------------------------------------------|"
+echo "| Reset complete.                                                                       |"
+echo "| Run ./setupDev.sh to reinitialize the dev environment.                               |"
+echo "| To also remove built Docker images, run: docker-compose down --rmi all              |"
+echo "|--------------------------------------------------------------------------------------|"
+echo ""