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/frontend/src/locales/en/issues.json

@@ -159,6 +159,18 @@
     "exec": {
       "title": "Execute in Session"
     },
+    "orchestrator": {
+      "title": "Send to Orchestrator",
+      "targetSession": "Target session",
+      "tool": "Tool",
+      "mode": "Mode",
+      "resumeStrategy": "resumeStrategy",
+      "send": "Send",
+      "sending": "Sending...",
+      "sentTitle": "Sent to Orchestrator",
+      "sentDesc": "Flow created: {flowId}",
+      "sendFailed": "Failed to send"
+    },
     "status": {
       "pending": "Pending",
       "ready": "Ready",
@@ -359,9 +371,38 @@
       "issues": "Issues",
       "board": "Board",
       "queue": "Queue",
-      "discovery": "Discovery"
+      "discovery": "Discovery",
+      "observability": "Observability"
     }
   },
+  "observability": {
+    "pageTitle": "Observability",
+    "description": "Audit and inspect automated deliveries and CLI session activity",
+    "audit": {
+      "title": "CLI Session Audit"
+    },
+    "filters": {
+      "search": "Search",
+      "searchPlaceholder": "Search type/sessionKey/resumeKey/details...",
+      "sessionKey": "Session Key",
+      "sessionKeyPlaceholder": "e.g. cli-xxxx",
+      "type": "Type",
+      "typeAll": "All types",
+      "limit": "Limit"
+    },
+    "table": {
+      "timestamp": "Timestamp",
+      "type": "Type",
+      "sessionKey": "Session",
+      "tool": "Tool",
+      "resumeKey": "Resume Key",
+      "workingDir": "Working Dir",
+      "ip": "IP",
+      "userAgent": "User Agent"
+    },
+    "empty": "No audit events",
+    "error": "Failed to load audit events"
+  },
   "board": {
     "pageTitle": "Issue Board",
     "description": "Visualize and manage issues in a kanban board",