API unificada

• GET/v1/connectorsLista conectores e estado de saúde.
• POST/v1/connectors/{id}/syncDispara sincronização incremental.
• GET/v1/catalog/datasetsBusca datasets com filtros de metadados.
• GET/v1/catalog/datasets/{id}/schemaEsquema normalizado e políticas de campo.
• GET/v1/lineage/{datasetId}Grafo de linhagem até a resposta.
• POST/v1/queryConsulta federada com ACL do usuário.
• GET/v1/policiesPolíticas de ACL, PII e residência.

type Query {
  connectors(status: Status, category: Category): [Connector!]!
  datasets(search: String, owner: String, first: Int = 25): DatasetConnection!
  dataset(id: ID!): Dataset
  lineage(datasetId: ID!, depth: Int = 3): LineageGraph!
  policies(scope: PolicyScope): [Policy!]!
}

type Dataset {
  id: ID!
  name: String!
  source: Connector!
  owner: String!
  freshness: Duration!
  classification: Classification!
  schema: [Field!]!
  acl: [Principal!]!
}

type Mutation {
  syncConnector(id: ID!, mode: IngestionMode): SyncRun!
  setFieldPolicy(datasetId: ID!, field: String!, policy: FieldPolicy!): Field!
}