fix: resolve all golangci-lint errcheck and staticcheck issues #5

	name: CodeQL
	# CodeQL static analysis for Go.
	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]
	schedule:
	# Mondays at 06:30 UTC (offset from security.yml to spread scheduled load).
	- cron: "30 6 * * 1"

	permissions:
	actions: read
	contents: read
	security-events: write

	concurrency:
	group: codeql-${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	env:
	GO_VERSION: "1.25.x"

	jobs:
	analyze:
	name: Analyze (Go)
	runs-on: ubuntu-latest
	permissions:
	contents: read
	security-events: write
	actions: read
	steps:
	- uses: actions/checkout@v6
	- name: Set up Go
	uses: actions/setup-go@v6
	with:
	go-version: ${{ env.GO_VERSION }}
	cache: false

	- name: Initialize CodeQL
	uses: github/codeql-action/init@v4
	with:
	languages: go
	build-mode: autobuild

	- name: Perform CodeQL Analysis
	uses: github/codeql-action/analyze@v4
	with:
	category: "/language:go"

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