Remove logging completely for unregistered cnight operations

[chrispalaskas]

Log Who triggers it

1 has no delegation part Non-base Cardano addresses — enterprise (addr1w…), pointer, reward. These cannot register for DUST by construction.
2 No valid dust registration Base addresses (payment + stake) whose reward address has not posted a DUST registration on Midnight. These users could register but haven't.
3 No create event for UTXO Spend of a UTXO whose create was dropped — i.e., the owner was unregistered at create time (the downstream of #2). Also fires if UtxoOwners was pruned, though that shouldn't happen in normal flow.

A middle ground for #2 and #3 would be demoting to log::trace!
which is what was done.

Overview

🗹 TODO before merging

• Ready

📌 Submission Checklist

• Changes are backward-compatible (or flagged if breaking)
• Pull request description explains why the change is needed
• Self-reviewed the diff
• I have included a change file, or skipped for this reason:
• If the changes introduce a new feature, I have bumped the node minor version
• Update documentation (if relevant)
• Updated AGENTS.md if build commands, architecture, or workflows changed
• No new todos introduced

🧪 Testing Evidence

Please describe any additional testing aside from CI:

• Additional tests are provided (if possible)

🔱 Fork Strategy

• Node Runtime Update
• Node Client Update
• Other:
• N/A

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