_all_profile_host_configs() built per-profile host keys inline as
f"{HOST}.{profile}" ("hermes.work") while profile_host_key() — used by
honcho status/enable/sync and the runtime memory plugin — produces the
underscore form ("hermes_work"). The lookup always missed, so
'hermes honcho peers' showed "(not set)" / leaked the raw malformed key
into the AI-peer column for every non-default profile. Profile names
needing sanitization (dots/spaces) were doubly broken.
Verified live: with hosts["hermes_work"] populated, cmd_peers showed
'work ... hermes.work' before the fix and 'work ... hermes' after.
Tests: host keys match the writer form, sanitized profile names resolve,
peers output shows populated identities with no key leak, and clean
fallback for profiles without a block.
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