📡 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/connection.ts

@@ -98,6 +98,12 @@ export class MCPConnection extends EventEmitter {
   timeout?: number;
   url?: string;
 
+  /**
+   * Timestamp when this connection was created.
+   * Used to detect if connection is stale compared to updated config.
+   */
+  public readonly createdAt: number;
+
   setRequestHeaders(headers: Record<string, string> | null): void {
     if (!headers) {
       return;
@@ -121,6 +127,7 @@ export class MCPConnection extends EventEmitter {
     this.iconPath = params.serverConfig.iconPath;
     this.timeout = params.serverConfig.timeout;
     this.lastPingTime = Date.now();
+    this.createdAt = Date.now(); // Record creation timestamp for staleness detection
     if (params.oauthTokens) {
       this.oauthTokens = params.oauthTokens;
     }
@@ -736,6 +743,17 @@ export class MCPConnection extends EventEmitter {
     this.oauthTokens = tokens;
   }
 
+  /**
+   * Check if this connection is stale compared to config update time.
+   * A connection is stale if it was created before the config was updated.
+   *
+   * @param configUpdatedAt - Unix timestamp (ms) when config was last updated
+   * @returns true if connection was created before config update, false otherwise
+   */
+  public isStale(configUpdatedAt: number): boolean {
+    return this.createdAt < configUpdatedAt;
+  }
+
   private isOAuthError(error: unknown): boolean {
     if (!error || typeof error !== 'object') {
       return false;