Vector Search Support

[yabsp]

UI support for vector indexes, adapter features, and PostgreSQL quick deploy

Frontend counterpart to the vector-search backend work.

• Vector indexes: index methods are filtered by category — vector columns (1-D ARRAY, fixed cardinality, non-nullable elements) get only VECTOR methods, others get the rest. Method parameters render as dynamic ENUM/INTEGER inputs and are sent via the new options map on IndexModel. Metric options respect element type (bit vectors -> HAMMING/JACCARD only), and vector indexes are restricted to a single column.
• Element nullability: elementsNullable added to ColumnModel/UiColumnDefinition, shown as elements: NOT NULL and preserved on column update.
• Adapter features: AdapterModel.features rendered as badges, with AdapterFeatureNamePipe for display names (vector -> pgvector, postgis -> PostGIS).
• PostgreSQL quick deploy: Minimal and Full (pgvector & PostGIS) presets deploy in one click; manual mode selection moves behind a toggle.

Requires backend support for adapter features, column elementsNullable, index method category/parameters, and the pgvector & PostGIS PostgreSQL image variant.