[CMGS]

Implements the per-repo part of cocoonstack/.github#1: revive default rules, nolintlint, Go 1.27.1, the pinned tool versions, projecteru2/core v0.1.5 and JSON log records when stderr is not a terminal (only the sections that apply here).

Commits

• 374df3b lint: enable revive default rules
• 66adadb lint: enable nolintlint, drop unused directives
• 657340a build: go 1.27.1
• 4bb46a0 deps: projecteru2/core v0.1.5
• 1679b26 log: JSON records when stderr is not a terminal

Notes

• log.Setup now sets UseJSON when stderr is not a terminal. vk-cocoon, cocoon-operator, cocoon-webhook and cocoon-net get it by re-pinning cocoon-common after this merges, so merge this one first.
• core v0.1.5 moves only indirect lines (docker/cli, sentry-go, x/mod, grpc).

JSON logs off a terminal

a demo binary using log.Setup: stderr to a file gives {"level":"info","func":"demo",...}; under a pty the console line keeps its colours.

Gates

Run with GOWORK=off against the pinned golangci-lint v2.13.2 (built with go1.27.1):

fmt-check PASS
lint PASS
asl-linux PASS
asl-darwin PASS
test PASS
build PASS

gofumpt v0.12.0 / goimports v0.50.0 are held until the next golangci-lint release vendors them (see the issue).