Adds startTime, endTime, duration, validationFailures, recoveryAttempts, and
recoverySuccesses to ExecutionMetrics in workflow/executor/ts/types.ts and
types/workflow.ts so ExecutionRecord.metrics is structurally compatible with
the richer type exported by the @metabuilder/workflow package barrel.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>