feat: increase eBPF ring buffer map size to 16K

[gruyaume]

Description

Ella Core currently does not start on Linux distros with page sizes of 16KB like Pi OS. This forces users to use Ubuntu on a Raspberry Pi for example.

Here we increase the eBPF ring buffer size to 16K in order to be compatible with 16K page size Linux distros like Pi OS.

Logs

2026-03-13T00:35:25+02:00 ella-core.cored[3229]: {"level":"error","ts":"2026-03-13T00:35:25.850+0200","caller":"ebpf/objects.go:106","msg":"failed to load eBPF program","component":"UPF","error":"field UpfN3N6EntrypointFunc: program upf_n3_n6_entrypoint_func: map nocp_map: map create: invalid argument (ring map size 4096 not a multiple of page size 16384)"}

Reference

• https://github.com/raspberrypi/linux/blob/rpi-6.6.y/arch/arm64/configs/bcm2712_defconfig

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that validate the behaviour of the software
• I validated that new and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules