v0.70.0

What's Changed

• build(docs): redesign documentation architecture by @cofin in #864
• fix(adbc): remove duckdb dependency and isolate adapter imports by @cofin in #865
• feat(fixtures): support sharded fixtures, vector columns, and cross-adapter sequence resync by @cofin in #863
• docs(style): polish branding, snippets, playground, and production examples by @cofin in #867
• docs(site): fix snippet rendering, unify header background, and consolidate navigation by @cofin in #869
• refactor(data-dictionary): replace scalar subqueries with CTEs and debloat column metadata by @cofin in #866
• feat(migrations,data-dictionary,builder): add canonical DDL squash, schema dump, and data-driven DDL synthesis by @cofin in #862
• test: overhaul test infrastructure for clientless pytest-databases by @cofin in #859
• feat(adapters): add sybase ase and sap sql anywhere dialects, data dictionaries, and adapters by @cofin in #870
• feat(storage,driver,adapters): add streaming Arrow batches, binary COPY, staged upserts, and index lifecycle by @cofin in #868
• chore(release): prepare v0.70.0 release, documentation overhaul, and adapter refinements by @cofin in #874
• fix(adapters): fix exception mapping, transactions, and settings consistency across adapters by @cofin in #875

Full Changelog: v0.69.0...v0.70.0