fix: stamp environment on agent_events rows

The agent_events table has an `environment` column and AgentEventsController
filters on it, but the INSERT never populated it — every row got the
column default ('default'). Result: Timeline on the Application Runtime
page was empty whenever the user's selected env was anything other than
'default'.

Thread env through the write path:
- AgentEventRepository.insert + AgentEventService.recordEvent gain an
  `environment` param; delete the no-env query overload (unused).
- ClickHouseAgentEventRepository.insert writes the column (falls back to
  'default' on null to match column DEFAULT).
- All 5 callers source env from the agent registry (AgentInfo.environmentId)
  or the registration request body; AgentLifecycleMonitor, deregister,
  command ack, event ingestion, register/re-register.
- Integration test updated for the new signatures.

Pre-existing rows in deployed CH will still report environment='default'.
New events from this build forward will carry the correct env. Backfill
(UPDATE ... FROM apps) is left as a manual DB step if historical timeline
is needed for non-default envs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

cameleer-server-app/src/main/java/com/cameleer/server/app/agent/AgentLifecycleMonitor.java

@@ -55,7 +55,8 @@ public class AgentLifecycleMonitor {
                 if (before != null && before != agent.state()) {
                     String eventType = mapTransitionEvent(before, agent.state());
                     if (eventType != null) {
-                        agentEventService.recordEvent(agent.instanceId(), agent.applicationId(), eventType,
+                        agentEventService.recordEvent(agent.instanceId(), agent.applicationId(),
+                                agent.environmentId(), eventType,
                                 agent.displayName() + " " + before + " -> " + agent.state());
                         serverMetrics.recordAgentTransition(eventType);
                     }

cameleer-server-app/src/main/java/com/cameleer/server/app/controller/AgentCommandController.java

@@ -223,7 +223,8 @@ public class AgentCommandController {
         if (body != null && body.status() != null) {
             AgentInfo agent = registryService.findById(id);
             String application = agent != null ? agent.applicationId() : "unknown";
-            agentEventService.recordEvent(id, application, "COMMAND_" + body.status(),
+            String environment = agent != null ? agent.environmentId() : null;
+            agentEventService.recordEvent(id, application, environment, "COMMAND_" + body.status(),
                     "Command " + commandId + ": " + body.message());
             log.debug("Command {} ack from agent {}: {} - {}", commandId, id, body.status(), body.message());
         }

cameleer-server-app/src/main/java/com/cameleer/server/app/controller/AgentRegistrationController.java

@@ -143,12 +143,12 @@ public class AgentRegistrationController {
         if (reRegistration) {
             log.info("Agent re-registered: {} (application={}, routes={}, capabilities={})",
                     request.instanceId(), application, routeIds.size(), capabilities.keySet());
-            agentEventService.recordEvent(request.instanceId(), application, "RE_REGISTERED",
+            agentEventService.recordEvent(request.instanceId(), application, environmentId, "RE_REGISTERED",
                     "Agent re-registered with " + routeIds.size() + " routes");
         } else {
             log.info("Agent registered: {} (application={}, routes={})",
                     request.instanceId(), application, routeIds.size());
-            agentEventService.recordEvent(request.instanceId(), application, "REGISTERED",
+            agentEventService.recordEvent(request.instanceId(), application, environmentId, "REGISTERED",
                     "Agent registered: " + request.instanceId());
         }
 
@@ -315,8 +315,9 @@ public class AgentRegistrationController {
             return ResponseEntity.notFound().build();
         }
         String applicationId = agent.applicationId();
+        String environment = agent.environmentId();
         registryService.deregister(id);
-        agentEventService.recordEvent(id, applicationId, "DEREGISTERED", "Agent deregistered");
+        agentEventService.recordEvent(id, applicationId, environment, "DEREGISTERED", "Agent deregistered");
         auditService.log(id, "agent_deregister", AuditCategory.AGENT, id, null, AuditResult.SUCCESS, httpRequest);
         return ResponseEntity.ok().build();
     }

cameleer-server-app/src/main/java/com/cameleer/server/app/controller/EventIngestionController.java

@@ -71,9 +71,10 @@ public class EventIngestionController {
 
         AgentInfo agent = registryService.findById(instanceId);
         String applicationId = agent != null ? agent.applicationId() : "";
+        String environment = agent != null ? agent.environmentId() : null;
 
         for (AgentEvent event : events) {
-            agentEventService.recordEvent(instanceId, applicationId,
+            agentEventService.recordEvent(instanceId, applicationId, environment,
                     event.getEventType(),
                     event.getDetails() != null ? event.getDetails().toString() : null);
 

cameleer-server-app/src/main/java/com/cameleer/server/app/storage/ClickHouseAgentEventRepository.java

@@ -18,7 +18,7 @@ import java.util.List;
 public class ClickHouseAgentEventRepository implements AgentEventRepository {
 
     private static final String INSERT_SQL =
-            "INSERT INTO agent_events (tenant_id, instance_id, application_id, event_type, detail) VALUES (?, ?, ?, ?, ?)";
+            "INSERT INTO agent_events (tenant_id, instance_id, application_id, environment, event_type, detail) VALUES (?, ?, ?, ?, ?, ?)";
 
     private static final String SELECT_BASE =
             "SELECT 0 AS id, instance_id, application_id, event_type, detail, timestamp FROM agent_events WHERE tenant_id = ?";
@@ -32,13 +32,9 @@ public class ClickHouseAgentEventRepository implements AgentEventRepository {
     }
 
     @Override
-    public void insert(String instanceId, String applicationId, String eventType, String detail) {
-        jdbc.update(INSERT_SQL, tenantId, instanceId, applicationId, eventType, detail);
-    }
-
-    @Override
-    public List<AgentEventRecord> query(String applicationId, String instanceId, Instant from, Instant to, int limit) {
-        return query(applicationId, instanceId, null, from, to, limit);
+    public void insert(String instanceId, String applicationId, String environment, String eventType, String detail) {
+        jdbc.update(INSERT_SQL, tenantId, instanceId, applicationId,
+                environment != null ? environment : "default", eventType, detail);
     }
 
     @Override