refactor: increase network size to 32 characters in the database

[andreabadesso]

Motivation

We store in the wallet-service the data from the fullnode's /v1a/version API in a version_data table.

This is done lazily when wallets request the /version API, it detects that the data it has in the database expired and requests again.

We noticed that the network field was being stored truncated, e.g.:

testnet-
nano-tes

Upon investigation, we found out that the version_data table had too few characters in its definition for the network column:

...
      version: {
        type: Sequelize.STRING(11),
        allowNull: false,
      },
      network: {
        type: Sequelize.STRING(8),
        allowNull: false,
      },
      min_weight: {
        type: Sequelize.FLOAT.UNSIGNED,
        allowNull: false,
      },
...

Which was causing it to truncate text when inserting.

Acceptance Criteria

• We should increase the size of the network column.

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged
• Make sure either the unit tests and/or the QA tests are capable of testing the new features
• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.