Extend D1 docs with clarifications for one-way type conversions#22093

lambrospetrou merged 2 commits intocloudflare:productioncloudflare/cloudflare-docs:productionfrom

lambrospetrou:lambros/CFSQL-1279-improve-docs-conversion-typeslambrospetrou/cloudflare-docs:lambros/CFSQL-1279-improve-docs-conversion-typesCopy head branch name to clipboard