feat: implement app-side telemetry sender

Add the shared telemetry sender, wire the CLI/server emit points,
and cover the config and completion behavior with tests.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/shared/src/index.ts

@@ -611,6 +611,8 @@ export {
   storageLocalDiskConfigSchema,
   storageS3ConfigSchema,
   secretsLocalEncryptedConfigSchema,
+  telemetryConfigSchema,
+  type TelemetryConfig,
   type PaperclipConfig,
   type LlmConfig,
   type DatabaseBackupConfig,