chore(netbird): upstream update available — server 0.78.2 → 0.81.3

Upstream Version Update Available

The following upstream component(s) for the netbird chart have new releases:

Component	Current Version	Latest Version	File	Field
server	`0.78.2`	`0.81.3`	`Chart.yaml`	`.appVersion`

Update the version references listed above.
Update any hardcoded version strings in test assertions (charts/netbird/tests/).
Review the upstream release notes for breaking changes.
Run make test to verify lint and unit tests pass.

This issue was created automatically by the upstream version checker.

Resolved by #150 — netbird appVersion bumped to 0.81.3 (dashboard v2.95.0); interim versions are covered by the same bump.