-- Entity Links plugin initial migration: creates entity_links table
CREATE TABLE IF NOT EXISTS entity_links (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,
    file_id UUID NOT NULL,
    entity_type VARCHAR(20) NOT NULL,
    entity_id UUID NOT NULL,
    created_by UUID,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT uq_entity_links_file_entity UNIQUE (tenant_id, file_id, entity_type, entity_id)
);
CREATE INDEX IF NOT EXISTS ix_entity_links_file ON entity_links(tenant_id, file_id);
CREATE INDEX IF NOT EXISTS ix_entity_links_entity ON entity_links(tenant_id, entity_type, entity_id);