fix: fetch actual agent/environment counts from server for tenant dashboard

The dashboard was showing hardcoded zeroes for agent and environment usage.
Now fetches real counts via M2M API from the tenant's server.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/main/java/net/siegeln/cameleer/saas/identity/ServerApiClient.java

@@ -124,6 +124,38 @@ public class ServerApiClient {
         }
     }
 
+    /** Fetch agent count from a tenant's server. */
+    public int getAgentCount(String serverEndpoint) {
+        try {
+            var resp = RestClient.create().get()
+                .uri(serverEndpoint + "/api/v1/agents")
+                .header("Authorization", "Bearer " + getAccessToken())
+                .header("X-Cameleer-Protocol-Version", "1")
+                .retrieve()
+                .body(java.util.List.class);
+            return resp != null ? resp.size() : 0;
+        } catch (Exception e) {
+            log.warn("Agent count fetch failed for {}: {}", serverEndpoint, e.getMessage());
+            return 0;
+        }
+    }
+
+    /** Fetch environment count from a tenant's server. */
+    public int getEnvironmentCount(String serverEndpoint) {
+        try {
+            var resp = RestClient.create().get()
+                .uri(serverEndpoint + "/api/v1/admin/environments")
+                .header("Authorization", "Bearer " + getAccessToken())
+                .header("X-Cameleer-Protocol-Version", "1")
+                .retrieve()
+                .body(java.util.List.class);
+            return resp != null ? resp.size() : 0;
+        } catch (Exception e) {
+            log.warn("Environment count fetch failed for {}: {}", serverEndpoint, e.getMessage());
+            return 0;
+        }
+    }
+
     public record ServerHealthResponse(boolean healthy, String status) {}
 
     private synchronized String getAccessToken() {

src/main/java/net/siegeln/cameleer/saas/portal/TenantPortalService.java

@@ -47,7 +47,8 @@ public class TenantPortalService {
             String name, String slug, String tier, String status,
             boolean serverHealthy, String serverStatus, String serverEndpoint,
             String licenseTier, long licenseDaysRemaining,
-            Map<String, Object> limits, Map<String, Object> features
+            Map<String, Object> limits, Map<String, Object> features,
+            int agentCount, int environmentCount
     ) {}
 
     public record LicenseData(
@@ -82,10 +83,16 @@ public class TenantPortalService {
 
         boolean serverHealthy = false;
         String serverStatus = "NO_ENDPOINT";
+        int agentCount = 0;
+        int environmentCount = 0;
         if (endpoint != null && !endpoint.isBlank()) {
             var health = serverApiClient.getHealth(endpoint);
             serverHealthy = health.healthy();
             serverStatus = health.status();
+            if (serverHealthy) {
+                agentCount = serverApiClient.getAgentCount(endpoint);
+                environmentCount = serverApiClient.getEnvironmentCount(endpoint);
+            }
         }
 
         String licenseTier = null;
@@ -107,7 +114,7 @@ public class TenantPortalService {
                 tenant.getTier().name(), tenant.getStatus().name(),
                 serverHealthy, serverStatus, endpoint,
                 licenseTier, licenseDaysRemaining,
-                limits, features
+                limits, features, agentCount, environmentCount
         );
     }