proper veDelegation

[alexcos20]

Fixes # .

Changes proposed in this PR:

• proper schema refactor
• veDelegation as state entity
• add veDelegationHistory, so we can track all past activities
• add proper tests

Query:

query{
  veDelegations(where:{delegator:"0xbe5449a6a97ad46c8558a3356267ee5d2731ab5e"}){
    id
    delegator {
      id
    }
    receiver{
      id
    }
    amount
    tokenId
    cancelTime
    expireTime
    updates(orderBy:timestamp orderDirection:asc){
      id
      block
      timestamp
      tx
      sender
      amount
      cancelTime
      expireTime
      type
    }
  }
}

Result : (contains both current state of veDelegation, and updates history)

{
  "data": {
    "veDelegations": [
      {
        "id": "0xf152cf3c67dfd41a317eae8fac0e1e8e98724a13-0xbe5449a6a97ad46c8558a3356267ee5d2731ab5e000000000000000000000000",
        "delegator": {
          "id": "0xbe5449a6a97ad46c8558a3356267ee5d2731ab5e"
        },
        "receiver": {
          "id": "0xa78deb2fa79463945c247991075e2a0e98ba7a09"
        },
        "amount": "0",
        "tokenId": "86088364704944767065825748042033305100613135882130307974387559050022387449856",
        "cancelTime": "0",
        "expireTime": "1716422400",
        "updates": [
          {
            "id": "0x3744fdcfed82aa1bda200fe7fa3367dce69ab8449dc632fd8d5574e18b8ee5ea-1",
            "block": 58,
            "timestamp": 1684562340,
            "tx": "0x3744fdcfed82aa1bda200fe7fa3367dce69ab8449dc632fd8d5574e18b8ee5ea",
            "sender": "0xbe5449a6a97ad46c8558a3356267ee5d2731ab5e",
            "amount": "12628448439876407820",
            "cancelTime": "0",
            "expireTime": "1716429726",
            "type": 0
          },
          {
            "id": "0x98b9f46b650426f9d95707ec459e4f05e56ed98b8a950a79f68bbe31f59f6aff-0",
            "block": 60,
            "timestamp": 1684562400,
            "tx": "0x98b9f46b650426f9d95707ec459e4f05e56ed98b8a950a79f68bbe31f59f6aff",
            "sender": "0xbe5449a6a97ad46c8558a3356267ee5d2731ab5e",
            "amount": "25256849315064840000",
            "cancelTime": "0",
            "expireTime": "1716422400",
            "type": 1
          },
          {
            "id": "0x686e389d2475028eaeae5170e2ff58a043ce732ddf548773e8efd84b92db7a06-0",
            "block": 62,
            "timestamp": 1684562460,
            "tx": "0x686e389d2475028eaeae5170e2ff58a043ce732ddf548773e8efd84b92db7a06",
            "sender": "0xbe5449a6a97ad46c8558a3356267ee5d2731ab5e",
            "amount": "0",
            "cancelTime": "0",
            "expireTime": "1716422400",
            "type": 2
          }
        ]
      }
    ]
  }
}