Move creator passwords into identity accounts

database/migrations/052_identity_creator_accounts.sql

@@ -0,0 +1,20 @@
+BEGIN;
+SET ROLE identity_role;
+CREATE TABLE IF NOT EXISTS identity.creator_accounts (
+  username TEXT PRIMARY KEY,
+  actor_id TEXT NOT NULL,
+  principal_id TEXT NOT NULL,
+  password_hash TEXT NOT NULL,
+  revision BIGINT NOT NULL DEFAULT 1,
+  password_changed_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  CHECK (username <> ''),
+  CHECK (actor_id <> ''),
+  CHECK (principal_id <> ''),
+  CHECK (password_hash <> ''),
+  CHECK (revision > 0),
+  UNIQUE (actor_id, principal_id)
+);
+CREATE INDEX IF NOT EXISTS creator_accounts_binding_idx ON identity.creator_accounts (actor_id, principal_id);
+REVOKE ALL ON identity.creator_accounts FROM PUBLIC;
+RESET ROLE;
+COMMIT;