chore: remove Codecov config

[devantler]

Coverage is now via GitHub Code Quality; the Codecov app and org token are removed, so this dead .github/codecov.yml is no longer used.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Removes the legacy Codecov configuration now that coverage reporting is handled via GitHub Code Quality, and the Codecov app/token are no longer in use.

Changes:

• Removed the Codecov ignore configuration from .github/codecov.yml.

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[github-actions]

✅⚠️MegaLinter analysis: Success with warnings

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	6		0	0	0.18s
✅ ACTION	zizmor	6	0	0	0	2.25s
✅ COPYPASTE	jscpd	yes		no	no	0.98s
✅ GO	golangci-lint	yes	yes	no	no	10.34s
✅ JSON	jsonlint	1		0	0	0.27s
✅ JSON	prettier	1	0	0	0	0.34s
✅ JSON	v8r	1		0	0	1.98s
⚠️ MARKDOWN	markdownlint	4	0	4	0	0.67s
✅ MARKDOWN	markdown-table-formatter	4	0	0	0	0.14s
✅ REPOSITORY	checkov	yes		no	no	32.03s
✅ REPOSITORY	gitleaks	yes		no	no	0.04s
✅ REPOSITORY	git_diff	yes		no	no	0.0s
✅ REPOSITORY	grype	yes		no	no	49.61s
✅ REPOSITORY	osv-scanner	yes		no	no	0.86s
✅ REPOSITORY	secretlint	yes		no	no	0.68s
✅ REPOSITORY	syft	yes		no	no	1.03s
✅ REPOSITORY	trivy	yes		no	no	13.26s
✅ REPOSITORY	trivy-sbom	yes		no	no	0.11s
✅ REPOSITORY	trufflehog	yes		no	no	2.43s
✅ SPELL	lychee	15		0	0	0.99s
✅ YAML	prettier	10	0	0	0	0.32s
✅ YAML	v8r	10		0	0	6.96s
✅ YAML	yamllint	10		0	0	0.81s

Detailed Issues

⚠️ MARKDOWN / markdownlint - 4 errors

.claude/skills/maintain/SKILL.md:5 error MD041/first-line-heading/first-line-h1 First line in a file should be a top-level heading [Context: "Perform maintenance per the **..."]
AGENTS.md:5:401 error MD013/line-length Line length [Expected: 400; Actual: 436]
AGENTS.md:31:401 error MD013/line-length Line length [Expected: 400; Actual: 1143]
CLAUDE.md:1 error MD041/first-line-heading/first-line-h1 First line in a file should be a top-level heading [Context: "@AGENTS.md"]

Notices

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