Invalid Country/City values crashed the processor on devnet

[mahmoud-emad]

Description

While testing node creation via the Polkadot UI, I encountered an unexpected behavior. Specifically, when setting the values of Country and City as random numbers, it resulted in a processor crash.

Related Issue

This issue has been documented and can be tracked here.

Node details

{
  version: 5
  id: 143
  farmId: 4,413
  twinId: 1,214
  resources: {
    hru: 1,073,741,824,000
    sru: 1,610,612,736,000
    cru: 1
    mru: 1,073,741,824,000
  }
  location: {
    city: 0x4413000150
    country: 0x4413000150
    latitude: 31.8105
    longitude: 31.8105
  }
  publicConfig: null
  created: 1,702,558,662
  farmingPolicyId: 1
  interfaces: []
  certification: Diy
  secureBoot: false
  virtualized: false
  serialNumber: null
  connectionPrice: 80
}

[mariobassem]

i added a check to detect invalid country/city values, still to be tested

[coesensbert]

i added a check to detect invalid country/city values, still to be tested

Where is this fix documented? So we can apply to other backends

[mariobassem]

the issue with the processor was that the country/city string was a hexadecimal encoded invalid utf-8 value, which postgres couldn't store as text.
the fix was to replace these invalid values with empty strings, a temporary solution until invalid values are validated against in the tfchain.

[mariobassem]

the fix in #144 didn't work because the input started with a valid byte 'D'

updated the fix to search for the invalid data in the entire Uint8Array, and tested it against devnet, the processor was able to process the bad country/city inputs and replaced them with empty strings