fix: appointmentStatus→status, missed call visibility, webhook callbackstatus, KB logging

- Renamed appointmentStatus to status in search + call-assist queries
- Missed calls worklist: removed agentName filter (shared FIFO queue)
- Webhook sets callbackstatus: PENDING_CALLBACK on missed calls
- AI chat: added KB content logging for debugging

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

src/search/search.controller.ts

@@ -50,7 +50,7 @@ export class SearchController {
 
                 this.platform.queryWithAuth<any>(
                     `{ appointments(first: 50, orderBy: [{ scheduledAt: DescNullsLast }]) { edges { node {
-                        id scheduledAt doctorName department appointmentStatus patientId
+                        id scheduledAt doctorName department status patientId
                     } } } }`,
                     undefined, authHeader,
                 ).catch(() => ({ appointments: { edges: [] } })),