Make drep query parser accept zero or more keys

[carlhammann]

Changelog

- description: |
    The `cardano-cli conway governance query drep-state` and `... drep-stake-distribution` now accept zero or more DRep verification keys, making the help messages correct.
# uncomment types applicable to the change:
  type:
  # - feature        # introduces a new feature
  # - breaking       # the API has changed in a breaking way
  # - compatible     # the API has changed but is non-breaking
  # - optimisation   # measurable performance improvements
  # - improvement    # QoL changes e.g. refactoring
  - bugfix         # fixes a defect
  # - test           # fixes/modifies tests
  # - maintenance    # not directly related to the code
  # - release        # related to a new release preparation
  # - documentation  # change in code docs, haddocks...

Context

This will close #346 .

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• The change log section in the PR description has been filled in
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • round trip tests
  • integration tests
    See Running tests for more details
• The version bounds in .cabal files are updated
• CI passes. See note on CI. The following CI checks are required:
  • Code is linted with hlint. See .github/workflows/check-hlint.yml to get the hlint version
  • Code is formatted with stylish-haskell. See .github/workflows/stylish-haskell.yml to get the stylish-haskell version
  • Code builds on Linux, MacOS and Windows for ghc-8.10.7 and ghc-9.2.7
• The changelog section in the PR is updated to describe the change
• Self-reviewed the diff

[CarlosLopezDeLara]

Beautiful!

cardano-cli conway governance query drep-state --testnet-magic 4 
[
  [
    {
      "keyHash": "037ca7363e8c9c7b3391bee7c45eb3222c5a600ddf8e268b0057b3a6"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 109
    }
  ],
  [
    {
      "keyHash": "058b60ead63f667c0ff5b40e269dd1f05ce3a804256735ad4eddce20"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 109
    }
  ],
  [
    {
      "keyHash": "20d832cb15463cc7ccfd40e9658c7398148594f81026591968acb4ce"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 112
    }
  ],
  [
    {
      "keyHash": "24a26a091058744472c20178bda9fcf811a5a31824cf0c49a976329f"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 106
    }
  ],
  [
    {
      "keyHash": "27ac1c7b513e95c3c952a37b46e94216caee6eca050cd00c914e7194"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 109
    }
  ],
  [
    {
      "keyHash": "33eb0023afe70a59e8c352be620a63d003bed0339a5a3c0c1646854f"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 105
    }
  ],
  [
    {
      "keyHash": "3b5c380f7830a35cda74f0969c3490221c2e548b31872772e00c17b1"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 106
    }
  ],
  [
    {
      "keyHash": "4e4dba8ccb384ef1f1682b6aefc21d2557699f0c0695d98331900503"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 106
    }
  ],
  [
    {
      "keyHash": "766df390f4cc2065c5e28ff175d9fc26cefd23124e8070f0e101dd1c"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 109
    }
  ],
  [
    {
      "keyHash": "83c733e900f1a5ea5879c977c9ee2138abacf5a3b81c0ac8d86d6f0a"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 112
    }
  ],
  [
    {
      "keyHash": "87c1de0f0c1028ae3c8ce482889f17f651a0c2f3b71a63029b05f0f0"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 106
    }
  ],
  [
    {
      "keyHash": "946f3a739c7fd618795e8d0e896708ed4dc00ed15be6a8b091ac8e40"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 106
    }
  ],
  [
    {
      "keyHash": "97a993b0c8166aa8c48345be19257a4025ab764c86e799beab15b303"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 105
    }
  ],
  [
    {
      "keyHash": "97a993b0c8166aa8c48345be19257a4025ab764c86e799beab15b304"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 105
    }
  ],
  [
    {
      "keyHash": "9ca61f53d9ab4a652a4c7b9d5b8e21d0409a5aa04ca0eea282eb5b0e"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 113
    }
  ],
  [
    {
      "keyHash": "9f7e0f20f3c644556abcc4263cfe05bfe1bd122da77465eb392f62eb"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 108
    }
  ],
  [
    {
      "keyHash": "a6fb0cc0a14dd67d87c22beecea780019de9dc2be1ed24992bc7c706"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 109
    }
  ],
  [
    {
      "keyHash": "b2a7f53b1cae7709ea715473bc0e68321bf70407fb7010349e8689dd"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 116
    }
  ],
  [
    {
      "keyHash": "b8580007d8e9b230dc71b161ca15b4d866060cd20b841b6b736033e4"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 106
    }
  ],
  [
    {
      "keyHash": "bbff55056ad81f6a0d1fb134db09c8cc1ac09de25f2c864f01b80877"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 109
    }
  ],
  [
    {
      "keyHash": "c4151afe9b5f4395dfa131f002fa760f55e324f50dc7cbd13a900ddf"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 113
    }
  ],
  [
    {
      "keyHash": "c9ff3121d65e945699cb6041ffef13bedd6726eecfdf138e5795e4a1"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 108
    }
  ],
  [
    {
      "keyHash": "cda7cbb5057ab5cab63c4b19866c39abda9908750640e245710646ee"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 107
    }
  ],
  [
    {
      "keyHash": "e4dafd31d35ce543d4442238efe31cc38a2f03fecc1e6bad9ffd7b1c"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 109
    }
  ],
  [
    {
      "keyHash": "e6181717c26e227812db49b14b9114220e313ccc31459c4675d61a34"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 106
    }
  ],
  [
    {
      "keyHash": "ec961dd3848d8c6531403145a8a4324d0be60438fe51232c6c087e27"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 104
    }
  ],
  [
    {
      "keyHash": "edddffe8c66db8bd598ec63733531c07fb4d08909ff1b881b42d7f0d"
    },
    {
      "anchor": null,
      "deposit": 0,
      "expiry": 106
    }
  ]
]

[CarlosLopezDeLara]

Also for drep-stake-distribution

cardano-cli conway governance query drep-stake-distribution --testnet-magic 4
[
    [
        {
            "contents": "058b60ead63f667c0ff5b40e269dd1f05ce3a804256735ad4eddce20",
            "tag": "DRepKeyHash"
        },
        9996965370
    ],
    [
        {
            "contents": "766df390f4cc2065c5e28ff175d9fc26cefd23124e8070f0e101dd1c",
            "tag": "DRepKeyHash"
        },
        9997483389
    ],
    [
        {
            "contents": "87c1de0f0c1028ae3c8ce482889f17f651a0c2f3b71a63029b05f0f0",
            "tag": "DRepKeyHash"
        },
        9997483389
    ],
    [
        {
            "contents": "946f3a739c7fd618795e8d0e896708ed4dc00ed15be6a8b091ac8e40",
            "tag": "DRepKeyHash"
        },
        9997656062
    ],
    [
        {
            "contents": "9ca61f53d9ab4a652a4c7b9d5b8e21d0409a5aa04ca0eea282eb5b0e",
            "tag": "DRepKeyHash"
        },
        4997484709
    ],
    [
        {
            "contents": "c9ff3121d65e945699cb6041ffef13bedd6726eecfdf138e5795e4a1",
            "tag": "DRepKeyHash"
        },
        9996256814
    ],
    [
        {
            "contents": "e4dafd31d35ce543d4442238efe31cc38a2f03fecc1e6bad9ffd7b1c",
            "tag": "DRepKeyHash"
        },
        9997310716
    ]
]