Ampersand Api Backfill Progress Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/ampersand/refs/heads/main/json-structure/ampersand-api-backfill-progress-structure.json",
  "name": "BackfillProgress",
  "description": "BackfillProgress schema from Ampersand API",
  "type": "object",
  "properties": {
    "installationId": {
      "type": "string",
      "description": "The installation ID."
    },
    "objectName": {
      "type": "string",
      "description": "The object being synced (e.g., contact, account)."
    },
    "operationId": {
      "type": "string",
      "description": "The ID of the backfill operation."
    },
    "recordsProcessed": {
      "type": "int32",
      "description": "The number of records processed so far. Updates as more records are read during the backfill.",
      "example": 1250
    },
    "recordsEstimatedTotal": {
      "type": "int32",
      "description": "The estimated total number of records to process. Only present for Salesforce and HubSpot; other connectors omit this field.",
      "example": 5000
    },
    "createTime": {
      "type": "datetime",
      "description": "When the backfill operation started."
    },
    "updateTime": {
      "type": "datetime",
      "description": "When progress was last updated."
    }
  },
  "required": [
    "installationId",
    "objectName",
    "operationId",
    "recordsProcessed"
  ]
}