Auto-remediate style-only findings (wsl_v5, nlreturn, noinlineerr, modernize, intrange, perfsprint, usetesting, unconvert, errorlint, gocritic, testifylint) and rename printf-style helpers to f-suffixed names (goprintffuncname): ui.Writer message methods, cli.ReportErrorf, database.Fatalf, vaultik stdoutf.
Copied byte-for-byte from the vendored policy set in sneak/prompts. The new config surfaces 2,990 lint findings; remediation is tracked in issue #61 rather than being bundled here, so #59 stays open until make check is green under this config.
