Updated `coreerr "dappco.re/go/core/log"` → `coreerr "dappco.re/go/log"`
across 12 files (actions.go, daemon.go, errors.go, exec/exec.go,
health.go, pkg/api/provider.go, process.go, process_global.go,
program.go, registry.go, runner.go, service.go). No stale path
remains in .go.
Pre-existing blocker (out of ticket scope): `dappco.re/go/io@v0.4.2`
is 404 from module proxy — affects `go test ./...` but is unrelated
to this import rename.
Closes tasks.lthn.sh/view.php?id=718
Co-authored-by: Codex <noreply@openai.com>
