v0.1.0-alpha.1

build(agent): bump Go 1.26.5 references to 1.26.6 (#60)

agent/Dockerfile's GO_VERSION build-arg default and hack/tools.mk's
GO_VERSION make variable were still 1.26.5, predating go.mod's
`go 1.26.6` requirement bumped in cd5ca84. hack/tools.mk's GO_VERSION
is the actual value docker-build-agent passes as --build-arg (it
overrides the Dockerfile default), so the container's `go mod download`
failed with "go.mod requires go >= 1.26.6 (running go 1.26.5;
GOTOOLCHAIN=local)".

Signed-off-by: Oleg Kushniriov <okushniriov@nvidia.com>