Run MegaLinter only on pull requests

[berendt]

MegaLinter was triggered on every push, including merges to main. This restricts the trigger to pull_request only, so it no longer runs after a merge to main.

🤖 Generated with Claude Code

[github-actions]

✅⚠️MegaLinter analysis: Success with warnings

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	5		0	0	0.04s
✅ JSON	jsonlint	4		0	0	0.12s
✅ JSON	prettier	4		0	0	0.32s
✅ JSON	v8r	4		0	0	9.76s
⚠️ MARKDOWN	markdownlint	160		4	0	2.63s
⚠️ MARKDOWN	markdown-table-formatter	160		1	0	0.43s
✅ REPOSITORY	checkov	yes		no	no	18.68s
✅ REPOSITORY	git_diff	yes		no	no	0.05s
✅ REPOSITORY	secretlint	yes		no	no	1.64s
✅ REPOSITORY	trufflehog	yes		no	no	3.48s
✅ SPELL	codespell	170		0	0	0.56s
⚠️ SPELL	lychee	170		1	0	41.4s
✅ YAML	prettier	6		0	0	0.48s
✅ YAML	v8r	6		0	0	6.0s
✅ YAML	yamllint	6		0	0	0.45s

Detailed Issues

⚠️ SPELL / lychee - 1 error

📝 Summary
---------------------
🔍 Total..........921
🔗 Unique.........745
✅ Successful.....853
⏳ Timeouts.........6
🔀 Redirected......47
👻 Excluded........61
❓ Unknown..........0
🚫 Errors...........1
⛔ Unsupported......1

Errors in docs/concepts/bom.md
[TIMEOUT] https://www.edge-core.com/product/as4610-54t/ (at 107:7) | Request timed out
[TIMEOUT] https://www.edge-core.com/product/dcs202/ (at 108:8) | Request timed out
[TIMEOUT] https://www.edge-core.com/product/dcs203/ (at 124:8) | Request timed out
[TIMEOUT] https://www.edge-core.com/product/dcs204/ (at 125:9) | Request timed out
[TIMEOUT] https://www.edge-core.com/product/dcs204/ (at 129:9) | Request timed out
[TIMEOUT] https://www.edge-core.com/product/dcs510/ (at 130:9) | Request timed out

Errors in docs/release-notes/index.md
[ERROR] https://release.osism.tech/ (at 11:1) | Connection failed. Check network connectivity and firewall settings

Hint: Followed 47 redirects. You might want to consider replacing redirecting URLs with the resolved URLs. Use verbose mode (`-v`/`-vv`) to see redirection details.

⚠️ MARKDOWN / markdown-table-formatter - 1 error

1 files contain markdown tables to format:
- docs/guides/developer-guide/retiring-openstack-releases.md

⚠️ MARKDOWN / markdownlint - 4 errors

docs/guides/developer-guide/retiring-openstack-releases.md:181:450 error MD060/table-column-style Table column style [Table pipe does not align with header for style "aligned"]
docs/guides/developer-guide/retiring-openstack-releases.md:181:535 error MD060/table-column-style Table column style [Table pipe does not align with header for style "aligned"]
docs/guides/developer-guide/retiring-openstack-releases.md:183:417 error MD060/table-column-style Table column style [Table pipe does not align with header for style "aligned"]
docs/guides/developer-guide/retiring-openstack-releases.md:183:502 error MD060/table-column-style Table column style [Table pipe does not align with header for style "aligned"]

Notices

📣 MegaLinter 9.5.0 is out! Discover the new features and security recommendations in the release announcement. (Skip this info by defining SECURITY_SUGGESTIONS: false)

See detailed reports in MegaLinter artifacts

Your project could benefit from a custom flavor, which would allow you to run only the linters you need, and thus improve runtime performances. (Skip this info by defining FLAVOR_SUGGESTIONS: false)

• Documentation: Custom Flavors
• Command: npx mega-linter-runner@9.5.0 --custom-flavor-setup --custom-flavor-linters ACTION_ACTIONLINT,JSON_JSONLINT,JSON_V8R,JSON_PRETTIER,MARKDOWN_MARKDOWNLINT,MARKDOWN_MARKDOWN_TABLE_FORMATTER,REPOSITORY_CHECKOV,REPOSITORY_GIT_DIFF,REPOSITORY_SECRETLINT,REPOSITORY_TRUFFLEHOG,SPELL_LYCHEE,SPELL_CODESPELL,YAML_PRETTIER,YAML_YAMLLINT,YAML_V8R

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