feat(client/compression): Log telemetry when compressing chat context. (#6195)

packages/core/src/telemetry/index.ts

@@ -28,6 +28,7 @@ export {
   logFlashFallback,
   logSlashCommand,
   logKittySequenceOverflow,
+  logChatCompression,
 } from './loggers.js';
 export {
   StartSessionEvent,
@@ -43,6 +44,8 @@ export {
   SlashCommandEvent,
   makeSlashCommandEvent,
   SlashCommandStatus,
+  ChatCompressionEvent,
+  makeChatCompressionEvent,
 } from './types.js';
 export { SpanStatusCode, ValueType } from '@opentelemetry/api';
 export { SemanticAttributes } from '@opentelemetry/semantic-conventions';