fix(test): align AgentCommandControllerIT with current spec

Two drifts corrected:
- registerAgent helper missing required environmentId (spec: 400 if absent).
- sendGroupCommand is now synchronous request-reply: returns 200 with an
  aggregated CommandGroupResponse {success,total,responded,responses,timedOut}
  — no longer 202 with {targetCount,commandIds}. Updated assertions and name.

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

cameleer-server-app/src/test/java/com/cameleer/server/app/controller/AgentCommandControllerIT.java

@@ -42,6 +42,7 @@ class AgentCommandControllerIT extends AbstractPostgresIT {
                 {
                   "instanceId": "%s",
                   "applicationId": "%s",
+                  "environmentId": "default",
                   "version": "1.0.0",
                   "routeIds": ["route-1"],
                   "capabilities": {}
@@ -77,7 +78,7 @@ class AgentCommandControllerIT extends AbstractPostgresIT {
     }
 
     @Test
-    void sendGroupCommand_returns202WithTargetCount() throws Exception {
+    void sendGroupCommand_returns200WithAggregateReplies() throws Exception {
         String group = "cmd-it-group-" + UUID.randomUUID().toString().substring(0, 8);
         registerAgent("agent-g1-" + group, "Group Agent 1", group);
         registerAgent("agent-g2-" + group, "Group Agent 2", group);
@@ -86,17 +87,20 @@ class AgentCommandControllerIT extends AbstractPostgresIT {
                 {"type": "deep-trace", "payload": {"correlationId": "group-trace-1"}}
                 """;
 
+        // Group dispatch is synchronous request-reply with a 10s deadline; returns
+        // 200 with the aggregated reply set (total/responded/timedOut). Neither agent
+        // holds an SSE connection in this test, so both time out but are counted.
         ResponseEntity<String> response = restTemplate.postForEntity(
                 "/api/v1/agents/groups/" + group + "/commands",
                 new HttpEntity<>(commandJson, securityHelper.authHeaders(operatorJwt)),
                 String.class);
 
-        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.ACCEPTED);
+        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
 
         JsonNode body = objectMapper.readTree(response.getBody());
-        assertThat(body.get("targetCount").asInt()).isEqualTo(2);
-        assertThat(body.get("commandIds").isArray()).isTrue();
-        assertThat(body.get("commandIds").size()).isEqualTo(2);
+        assertThat(body.get("total").asInt()).isEqualTo(2);
+        assertThat(body.get("timedOut").isArray()).isTrue();
+        assertThat(body.get("timedOut").size()).isEqualTo(2);
     }
 
     @Test