Convert ynab_budget_summary, ynab_search_transactions, ynab_spending_report
and ynab_category_budget to content_and_artifact (ynab.summary,
ynab.transactions, ynab.spending_report, ynab.category_budget). The text
the LLM sees is unchanged. Not-synced, bad-input, empty and error paths
return no artifact; Decimals become floats and dates ISO strings.
ynab_search_transactions now fetches up to 500 rows in one query (with an
id tie-break so ordering is stable) and lists the first `limit` in the
text; the artifact carries all of them. ynab_account_balances,
ynab_recent_changes and ynab_sql stay text-only.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ryan Chen