Fix HIGH priority issues: unbounded queries, rate limiting, health checks

Issue #3 - Unbounded Query Results (OOM):
- get_all_archived_history() now uses keyset pagination with bounded max_rows (50k default)
- Added 'id' field to records from get_archived_history() and get_archived_history_keyset()
- Protocol signature updated with page_size, max_rows, last_ban_id params

Issue #7 - Docker Health Check Fails:
- Added curl to Dockerfile.backend runtime image
- HEALTHCHECK now uses 'curl -f http://localhost:8000/api/health'
- compose.prod.yml: increased start_period to 40s, timeout to 10s
- Frontend healthcheck proxies to backend /api/health

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

backend/app/routers/config_misc.py

@@ -27,6 +27,7 @@ from app.models.config import (
     RegexTestResponse,
     ServiceStatusResponse,
 )
+from app.mappers import config_mappers
 from app.services import (
     config_service,
     jail_service,
@@ -94,7 +95,8 @@ async def get_global_config(
     Raises:
         HTTPException: 502 when fail2ban is unreachable.
     """
-    return await config_service.get_global_config(socket_path)
+    domain_result = await config_service.get_global_config(socket_path)
+    return config_mappers.map_domain_global_config_to_response(domain_result)
 
 
 @router.put(
@@ -400,7 +402,8 @@ async def get_service_status(
     """
     from app.services import health_service
 
-    return await health_service.get_service_status(
+    domain_result = await health_service.get_service_status(
         socket_path,
         probe_fn=health_service.probe,
     )
+    return config_mappers.map_domain_service_status_to_response(domain_result)