GET /xrpc/tech.waow.typeahead.searchActors typeahead.waow.tech

remove D1, simplify to Turso-only storage master

D1 abstraction layer (d1Db, dualWriteDb, getBackend, createDb, StorageBackend) was migration scaffolding — Turso is serving all traffic. also adds @libsql/client dep, gitignores .dev.vars, updates smoke tests for !no-unauthenticated inclusion policy, and includes the migration script for historical reference. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>