* Add lint/format checks to the Gitea release workflow and Makefile (targets: vet, fmt, fmt-check, staticcheck, govulncheck, check) * Switch .golangci.json formatter from gofmt to gofumpt (extra.group-params) * Bump golang.org/x/text 0.37.0 -> 0.39.0 for GO-2026-5970; re-vendor * Fix staticcheck S1011 in pkg/diff; drop unused pgsql writer helpers * Fix gocritic unnamedResult (pkg/diff) and rangeValCopy (pkg/pgsql) * Apply gofumpt + goimports formatting across the tree