feat: release getmnemo-migrate 0.2.0

[shhahhussain]

Summary

• fix provider export contracts and enforce source-container scoping
• isolate malformed JSONL records and support per-record destination containers
• use bounded document batches with automatic single-write fallback
• add retry-failed, retrieval verify, and machine-readable JSON reports
• document the customer-export pilot flow
• bump package version to 0.2.0

Test plan

• 23 tests passed
• TypeScript typecheck passed
• production build passed
• npm package dry-run passed

Checklist

• Conventional commit title
• Tests added or updated
• Docs updated
• No secrets, API keys, or .env files committed
• No debug statements