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>

.gitignore

@@ -1,9 +1,6 @@
-data/job-archive
-data/job-archive/**
-data/sqldata
-data/cc-metric-store
-data/cc-metric-store-source
-data/slurm
+# everything under data/ is generated by dataGenerationScript.sh
+data/
+
 cc-backend/**
-.vscode
 cc-backend
+.vscode