feat: add migrations for validator-tagger-lido-csm-module

Author: guybrush

backend/pkg/commons/db/migrations/postgres/20251008214600_add_lido_simple_dvt_module.sql

@@ -0,0 +1,24 @@
+-- +goose Up
+-- +goose StatementBegin
+-- Lido Simple DVT: Node operators (minimal fields)
+CREATE TABLE IF NOT EXISTS lido_simple_dvt_node_operators (
+    operator_id BIGINT PRIMARY KEY,
+    signing_key_count BIGINT NOT NULL DEFAULT 0,
+    name text not null default ''
+);
+
+-- Lido CSM: Signing keys per operator
+CREATE TABLE IF NOT EXISTS lido_simple_dvt_signing_keys (
+     operator_id BIGINT NOT NULL REFERENCES lido_simple_dvt_node_operators(operator_id) ON DELETE CASCADE,
+     pubkey BYTEA NOT NULL,
+     PRIMARY KEY (operator_id, pubkey)
+);
+CREATE INDEX IF NOT EXISTS idx_lido_simple_dvt_signing_keys_operator_id ON lido_simple_dvt_signing_keys (operator_id);
+CREATE INDEX IF NOT EXISTS idx_lido_simple_dvt_signing_keys_pubkey ON lido_simple_dvt_signing_keys (pubkey);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS lido_simple_dvt_signing_keys;
+DROP TABLE IF EXISTS lido_simple_dvt_node_operators;
+-- +goose StatementEnd