fix: disable client-side validation for custom lexicons
@atproto/api validate: true rejects org.v-it.cap and org.v-it.skill
because custom lexicons aren't registered with the client library.
The PDS accepts custom record types regardless. Set validate: false
for putRecord calls — the lexicon schema in lexicons/ is the source
of truth, not client-side validation.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>