Fredrik Wahlberg 773453bd51 Fix Bluetooth permission error with AmbientCapabilities and enhanced postinst ...

- Add AmbientCapabilities=CAP_NET_RAW CAP_NET_ADMIN to systemd service files
- Add sensorpajen user to bluetooth group in postinst
- Improve setcap error handling in postinst with clearer messaging
- Add comprehensive troubleshooting section for Bluetooth permission errors

This fixes the 'Operation not permitted' error when the service tries to
access Bluetooth hardware. The fix uses two layers of protection:
1. systemd AmbientCapabilities (modern, robust)
2. File capabilities via setcap (traditional, wider compatibility)

2026-02-20 08:57:28 +01:00

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