feat: Add SLD endpoints, add date_to to vector_with_kato

migrations/00008_add_sld_to_datasets.sql

@@ -0,0 +1,12 @@
+-- +goose Up
+-- Optional SLD (Styled Layer Descriptor) style file for a dataset. Applies to
+-- every file_type; a dataset may have at most one (uploading again replaces
+-- it).
+ALTER TABLE datasets ADD COLUMN sld_storage_key TEXT;
+ALTER TABLE datasets ADD COLUMN sld_filename VARCHAR(255);
+ALTER TABLE datasets ADD COLUMN sld_content_type VARCHAR(255);
+
+-- +goose Down
+ALTER TABLE datasets DROP COLUMN sld_storage_key;
+ALTER TABLE datasets DROP COLUMN sld_filename;
+ALTER TABLE datasets DROP COLUMN sld_content_type;