include delegation hash in mnemonic address generation

[garymathews]

• Addresses generated from a mnemonic fail to register (400 Bad Request)
• The delegation hash is required to generate a valid address

[leeeroyd]

Curious if you're also observing errors on submission with 400 error codes citing Submitting solution (Nonce: 000000000000f45a) __ Non-recoverable API Submission Error. Deleting from queue. Details: API Validation Failed: (Status 400) Solution validation failed: Solution does not meet difficulty [API Code: 400] ?

[disassembler]

I'm against adding this because so many people are already using enterprise addresses, and there's no benefit to delegation key that's not used being added to the address. The problem is likely because you used this wallet in the web UI and it's generating an address that conflicts with the one generated there.

If you want this feature, my recommendation would be add a CLI flag --include-delegation that optionally makes the longer address format, but keep the default to enterprise addresses.