docs(en): Update English docs for Vector SQL Integration
- docs/en/vector.md — add SQL usage section (CREATE TABLE VECTOR,
distance functions, <-> operator, CREATE INDEX USING hnsw)
- docs/en/baraql.md — update vector search section with real SQL syntax,
add VECTOR(n) to data types, update keyword table
- docs/en/changelog.md — add Vector SQL Integration and bugfixes to [Unreleased]
- docs/ARCHITECTURE.md — add SQL Integration bullet to Vector Engine
- README.md — update vector engine section with SQL examples,
add Vector SQL to roadmap, bump test count to 340+
dimgigov
b0978812cb