feat: add orchestrator execution engine, observability panel, and LSP document caching

Wire FlowExecutor into orchestrator routes for actual flow execution with
pause/resume/stop lifecycle management. Add CLI session audit system with
audit-routes backend and Observability tab in IssueHub frontend. Introduce
cli-session-mux for cross-workspace session routing and QueueSendToOrchestrator
UI component. Normalize frontend API response handling for { data: ... }
wrapper format and propagate projectPath through flow hooks.

In codex-lens, add per-server opened-document cache in StandaloneLspManager
to avoid redundant didOpen notifications (using didChange for updates), and
skip warmup delay for already-warmed LSP server instances in ChainSearchEngine.

ccw/src/core/server.ts

@@ -9,6 +9,7 @@ import { handleStatusRoutes } from './routes/status-routes.js';
 import { handleCliRoutes, cleanupStaleExecutions } from './routes/cli-routes.js';
 import { handleCliSettingsRoutes } from './routes/cli-settings-routes.js';
 import { handleCliSessionsRoutes } from './routes/cli-sessions-routes.js';
+import { handleAuditRoutes } from './routes/audit-routes.js';
 import { handleProviderRoutes } from './routes/provider-routes.js';
 import { handleMemoryRoutes } from './routes/memory-routes.js';
 import { handleCoreMemoryRoutes } from './routes/core-memory-routes.js';
@@ -615,6 +616,11 @@ export async function startServer(options: ServerOptions = {}): Promise<http.Ser
         if (await handleCliSessionsRoutes(routeContext)) return;
       }
 
+      // Audit routes (/api/audit/*)
+      if (pathname.startsWith('/api/audit')) {
+        if (await handleAuditRoutes(routeContext)) return;
+      }
+
       // CLI routes (/api/cli/*)
       if (pathname.startsWith('/api/cli/')) {
         // CLI Settings routes first (more specific path /api/cli/settings/*)