fix: route catalog missing routes after server restart

After server restart, auto-healed agents register with empty
routeIds. The catalog only looked at agent registry for routes,
so routes and counts disappeared.

Now merges route IDs from ClickHouse stats_1m_route into the
catalog. Also includes apps that only exist in ClickHouse data
(no agent currently registered). Routes and exchange counts
survive server restarts.

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

cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/RouteCatalogController.java

@@ -103,6 +103,16 @@ public class RouteCatalogController {
             log.warn("Failed to query route exchange counts: {}", e.getMessage());
         }
 
+        // Merge route IDs from ClickHouse stats into routesByApp.
+        // After server restart, auto-healed agents have empty routeIds, but
+        // ClickHouse still has execution data with the correct route IDs.
+        for (var countEntry : routeExchangeCounts.entrySet()) {
+            String[] parts = countEntry.getKey().split("/", 2);
+            if (parts.length == 2) {
+                routesByApp.computeIfAbsent(parts[0], k -> new LinkedHashSet<>()).add(parts[1]);
+            }
+        }
+
         // Per-agent TPS from the last minute
         Map<String, Double> agentTps = new LinkedHashMap<>();
         try {
@@ -117,11 +127,13 @@ public class RouteCatalogController {
             // AggregatingMergeTree table may not exist yet
         }
 
-        // Build catalog entries
+        // Build catalog entries — merge apps from agent registry + ClickHouse data
+        Set<String> allAppIds = new LinkedHashSet<>(agentsByApp.keySet());
+        allAppIds.addAll(routesByApp.keySet());
+
         List<AppCatalogEntry> catalog = new ArrayList<>();
-        for (var entry : agentsByApp.entrySet()) {
-            String appId = entry.getKey();
-            List<AgentInfo> agents = entry.getValue();
+        for (String appId : allAppIds) {
+            List<AgentInfo> agents = agentsByApp.getOrDefault(appId, List.of());
 
             // Routes
             Set<String> routeIds = routesByApp.getOrDefault(appId, Set.of());