Unique key search not working

[mk3008]

DbIndex attribute is recognized.

[DbIndex(isUnique: true, nameof(KeyName))]
[DbTable]
public class InterlinkDatasource
{
    [DbColumn("text")]
    public required string KeyName { get; set; }
}

Even if a unique constraint is added to the DbColumn attribute, it is not recognized.

[DbTable]
public class InterlinkDatasource
{
    [DbColumn("text", IsUniqueKey = true)]
    public required string KeyName { get; set; }
}

NOTE:
create table query

CREATE TABLE interlink.interlink_datasource (
	interlink_datasource_id bigserial NOT NULL,
	datasource_name text NOT NULL,
	description text NOT NULL,
	destination_id int8 NOT NULL,
	query text NOT NULL,
	key_name text NOT NULL,
	key_columns text NOT NULL,
	created_at timestamp NOT NULL,
	updated_at timestamp NOT NULL,
	lock_version int8 NOT NULL,
	CONSTRAINT interlink_datasource_pkey PRIMARY KEY (interlink_datasource_id)
);
CREATE UNIQUE INDEX i1_interlink_datasource ON interlink.interlink_datasource USING btree (key_name);

CREATE TABLE interlink.interlink_datasource (
	interlink_datasource_id bigserial NOT NULL,
	datasource_name text NOT NULL,
	description text NOT NULL,
	destination_id int8 NOT NULL,
	query text NOT NULL,
	key_name text NOT NULL,
	key_columns text NOT NULL,
	created_at timestamp NOT NULL,
	updated_at timestamp NOT NULL,
	lock_version int8 NOT NULL,
	CONSTRAINT interlink_datasource_key_name_key UNIQUE (key_name),
	CONSTRAINT interlink_datasource_pkey PRIMARY KEY (interlink_datasource_id)
);