feat: caller cache invalidation endpoint + worklist auth fix

- POST /api/caller/invalidate — clears Redis cache for a phone number
- WorklistController: resolves agent name from login cache (avoids currentUser query)
- AuthController: caches agent name in Redis during login (keyed by token suffix)
- WorklistModule: imports AuthModule (forwardRef for circular dep)

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

src/auth/auth.controller.ts

@@ -166,6 +166,12 @@ export class AuthController {
                 }
             }
 
+            // Cache agent name for worklist resolution (avoids re-querying currentUser with user JWT)
+            const agentFullName = `${workspaceMember?.name?.firstName ?? ''} ${workspaceMember?.name?.lastName ?? ''}`.trim();
+            if (agentFullName) {
+                await this.sessionService.setCache(`agent:name:${accessToken.slice(-16)}`, agentFullName, 86400);
+            }
+
             return {
                 accessToken,
                 refreshToken: tokens.refreshToken.token,