fix(openpanel): pin verified 2.2.1 images and fix ClickHouse interserver host

- Pin lindesvard/openpanel-api|dashboard|worker to 2.2.1 (verified working
  end-to-end on a Dokploy instance) instead of the mutable :2 tag, so a
  future broken 2.x release cannot silently break the template again —
  which is how #615 originated when 2.0.0 shipped.
- Fix interserver_http_host to match the actual service name (op-ch),
  aligning with upstream self-hosting config.
- Set meta.json version to the pinned 2.2.1.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

blueprints/openpanel/docker-compose.yml

@@ -54,7 +54,7 @@ services:
       retries: 5
 
   op-api:
-    image: lindesvard/openpanel-api:2
+    image: lindesvard/openpanel-api:2.2.1
     restart: always
     command: >
       sh -c "
@@ -97,7 +97,7 @@ services:
         condition: service_healthy
 
   op-dashboard:
-    image: lindesvard/openpanel-dashboard:2
+    image: lindesvard/openpanel-dashboard:2.2.1
     restart: always
     depends_on:
       op-api:
@@ -111,7 +111,7 @@ services:
       retries: 5
 
   op-worker:
-    image: lindesvard/openpanel-worker:2
+    image: lindesvard/openpanel-worker:2.2.1
     restart: always
     depends_on:
       op-api:

blueprints/openpanel/meta.json

@@ -1,7 +1,7 @@
 {
   "id": "openpanel",
   "name": "OpenPanel",
-  "version": "latest",
+  "version": "2.2.1",
   "description": "An open-source web and product analytics platform that combines the power of Mixpanel with the ease of Plausible and one of the best Google Analytics replacements.",
   "logo": "logo.svg",
   "links": {

blueprints/openpanel/template.toml

@@ -26,7 +26,7 @@ content = """
     <part_log remove="remove"/>
     <listen_host>0.0.0.0</listen_host>
     <interserver_listen_host>0.0.0.0</interserver_listen_host>
-    <interserver_http_host>opch</interserver_http_host>
+    <interserver_http_host>op-ch</interserver_http_host>
     <!-- Disable cgroup memory observer -->
     <cgroups_memory_usage_observer_wait_time>0</cgroups_memory_usage_observer_wait_time>
     <!-- Not used anymore, but kept for backwards compatibility -->