Summary

• add an explicit Honcho cloud privacy notice during setup before collecting the API key
• require confirmation before continuing with api.honcho.dev, canceling without writing config when declined
• document the cloud data flow in the Honcho README and memory provider guide

Closes #4074

Tests

• python3 -m pytest tests/honcho_plugin/test_cli.py -q -o 'addopts='
• python3 -m pytest tests/honcho_plugin tests/test_honcho_client_config.py -q -o 'addopts='
• python3 -m py_compile plugins/memory/honcho/cli.py
• git diff --check