Fetch data with conditions

Fetches rows from a table or view using structured conditions, optional pagination, sort instructions, and optional post-processing (`group_by`, `time_granularity`, aggregation options). Notes: - Route selection is based on `X-Athena-Client` (or custom Supabase headers for `custom_supabase`). - `X-Strip-Nulls` can be used to remove null-valued fields from response payloads. - Cache behavior may include `X-Athena-Cached`, `X-Athena-Cache-Outcome`, and `X-Athena-Cache-Source` headers.

curl -X POST "https://athena-cluster.com/gateway/fetch" \  -H "Content-Type: application/json" \  -d '{    "table_name": "http_request_log",    "columns": [      "id",      "path",      "status_code",      "created_at"    ],    "conditions": [      {        "eq_column": "client_name",        "eq_value": "athena_logging"      }    ],    "limit": 25,    "current_page": 1,    "sortBy": {      "field": "created_at",      "direction": "desc"    }  }'

{
  "status": "success",
  "message": "Fetched 25 rows",
  "data": {
    "rows": [
      {
        "id": "5d845b27-8d06-40a0-9e76-08de9d9f3c1f",
        "path": "/gateway/fetch",
        "status_code": 200,
        "created_at": "2026-04-14T10:15:00Z"
      }
    ],
    "row_count": 25
  }
}