Swap Only Subgraphs - Ensure all nested values are created

[melotik]

For all swap-only subgraphs all nested entities need to be created (with ID only at least).

Acceptance criteria (should be able to make this query):

query MyQuery {
  swaps {
     account {
       id
     }
    pool {
      id
    }
    protocol {
      id
    }
    tokenIn {
      id
    }
    tokenOut {
      id
    }
  }
}

Notes: For most of subgaphs, the only entity that needs to be added is account

See: pancakeswap