📡 refactor: MCP Runtime Config Sync with Redis Distributed Locking (#10352)

* 🔄 Refactoring: MCP Runtime Configuration Reload
 - PrivateServerConfigs own cache classes (inMemory and Redis).
 - Connections staleness detection by comparing (connection.createdAt and config.LastUpdatedAt)
 - ConnectionsRepo access Registry instead of in memory config dict and renew stale connections
 - MCPManager: adjusted init of ConnectionsRepo (app level)
 - UserConnectionManager: renew stale connections
 - skipped test, to test "should only clear keys in its own namespace"
 - MCPPrivateServerLoader: new component to manage logic of loading / editing private servers on runtime
 - PrivateServersLoadStatusCache to track private server cache status
 - New unit and integration tests.
Misc:
 - add es lint rule to enforce line between class methods

* Fix cluster mode batch update and delete workarround. Fixed unit tests for cluster mode.

* Fix Keyv redis clear cache namespace  awareness issue + Integration tests fixes

* chore: address copilot comments

* Fixing rebase issue: removed the mcp config fallback in single getServerConfig method:
- to not to interfere with the logic of the right Tier (APP/USER/Private)
- If userId is null, the getServerConfig should not return configs that are a SharedUser tier and not APP tier

* chore: add dev-staging branch to workflow triggers for backend, cache integration, and ESLint checks

---------

Co-authored-by: Atef Bellaaj <slalom.bellaaj@external.daimlertruck.com>

packages/api/src/mcp/registry/cache/BaseRegistryCache.ts

@@ -9,6 +9,11 @@ import { isLeader } from '~/cluster';
 export abstract class BaseRegistryCache {
   protected readonly PREFIX = 'MCP::ServersRegistry';
   protected abstract readonly cache: Keyv;
+  protected readonly leaderOnly: boolean;
+
+  constructor(leaderOnly?: boolean) {
+    this.leaderOnly = leaderOnly ?? false;
+  }
 
   protected async leaderCheck(action: string): Promise<void> {
     if (!(await isLeader())) throw new Error(`Only leader can ${action}.`);
@@ -20,7 +25,9 @@ export abstract class BaseRegistryCache {
   }
 
   public async reset(): Promise<void> {
-    await this.leaderCheck(`reset ${this.cache.namespace} cache`);
+    if (this.leaderOnly) {
+      await this.leaderCheck(`reset ${this.cache.namespace} cache`);
+    }
     await this.cache.clear();
   }
 }