Follow-up to the tombstone salvage (review point 1): named_profile_home()
treated ANY path whose ancestor's parent dir was literally named
'profiles' as a named profile until a '.hermes' ancestor appeared. An
unrelated custom HERMES_HOME like /srv/profiles/buildcache would resolve
as profile 'buildcache', and setup_logging would raise FileNotFoundError
instead of creating logs/ — a behavior regression for non-profile users.
Recognition now requires the 'profiles' directory's parent to BE a
Hermes home: the classic ~/.hermes layout, a root carrying home marker
files (config.yaml / .env / state.db — covers Docker/custom roots), a
profiles/.deleted tombstone dir (only ever created by profile delete),
or the process's resolved default Hermes root.
Adds regression tests for the /srv/profiles/<x> false-positive shape
(named_profile_home is None, mkdir_under_hermes_home and setup_logging
still create dirs) plus the tombstone-dir and ~/.hermes anchors. Also
adds encoding= to a bare write_text in the salvaged test file
(Windows-footgun gate).
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