feat: simplify SOP to immediate-effect configuration

migrations/000003_multitable_outbox.up.sql

@@ -0,0 +1,23 @@
+CREATE TABLE multitable_outbox (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  tenant_id BIGINT UNSIGNED NOT NULL,
+  audit_log_id BIGINT UNSIGNED NULL,
+  resource VARCHAR(64) NOT NULL,
+  resource_id BIGINT UNSIGNED NOT NULL,
+  action VARCHAR(64) NOT NULL,
+  payload JSON NOT NULL,
+  dedupe_key VARCHAR(191) NOT NULL,
+  status VARCHAR(24) NOT NULL DEFAULT 'pending',
+  attempts INT NOT NULL DEFAULT 0,
+  available_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  last_error TEXT NOT NULL,
+  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_multitable_outbox_audit (audit_log_id),
+  UNIQUE KEY uk_multitable_outbox_dedupe (dedupe_key),
+  KEY idx_multitable_outbox_pending (status, available_at),
+  KEY idx_multitable_outbox_resource (tenant_id, resource, resource_id),
+  CONSTRAINT fk_multitable_outbox_tenant FOREIGN KEY (tenant_id) REFERENCES tenants(id),
+  CONSTRAINT fk_multitable_outbox_audit FOREIGN KEY (audit_log_id) REFERENCES audit_logs(id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;