feat: lint

[swift1337]

Apply new linting rules to the codebase.

---

Note

Overview

Applies stricter linting and formatting across the repo and adjusts code accordingly; behavior remains the same.

• Updates .golangci.yml: adds golines, reorders gci sections with project prefix, sets generated: strict, and refines exclusion/rule presets (e.g., scoped staticcheck, revive var-naming, errcheck, gosec patterns)
• Widespread lint-driven refactors: reorder imports, wrap long args, convert unused params to _, add //nolint where appropriate, and improve structured logging formatting
• Security/IO tweaks: annotate intentional file perms (MkdirAll/OpenFile/WriteFile) and close/sync handling in logging/results utilities
• Minor test/log output adjustments and small helper signature cleanups to satisfy linters

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[aljo242]

can just // nolint this error