Pre-starting pured in the entrypoint caused ETXTBSY when the install
subprocess (triggered by createRootProcessForMissingComponents) tried
to overwrite the running daemon binary.
- Remove pured pre-start from entrypoint; daemon starts via
`systemctl start pured` inside the install subprocess instead
- systemctl stop: use pkill -9 + sleep 1 for reliable termination
- systemctl start: wait up to 15s for :9485 instead of blind sleep 2
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>