Chore(deps): bump cilium, x/crypto, x/net, x/sys to fix security advisories (#824)

- github.com/cilium/cilium v1.17.14 => v1.17.15 (GHSA-gj49-89wh-h4gj)
- golang.org/x/crypto v0.50.0 => v0.52.0 (GO-2026-5005 through GO-2026-5033)
- golang.org/x/net v0.53.0 => v0.55.0 (GO-2026-5024 through GO-2026-5030)
- golang.org/x/sys v0.43.0 => v0.45.0 (GO-2026-5024)

Note: GHSA-x744-4wpc-v9h2 (moby/moby, docker/docker) fixed in v29.3.1
which is not yet published to the Go module proxy.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>