PostgreSQL's initdb refuses to run as root, so the embedded Hindsight
daemon could never initialize its data directory under root. The
daemon-start thread would fail, retry, and loop forever — each cycle
reloading embedding models (~958MB RAM, ~33% CPU) with no user-visible
error, leaving Hermes sluggish on a common VPS/cloud root setup.
initialize() now detects root (os.geteuid() == 0) before spawning the
daemon thread, disables local_embedded mode, and surfaces a clear
warning to both the log and the terminal so the user knows to run as a
non-root user or switch to cloud / local_external mode.
Closes#13125.
Co-authored-by: teknium1 <127238744+teknium1@users.noreply.github.com>
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