chore(ci): node26

[jkowalleck]

Description

add node26 to CI pipelines.
interim fix for yargs/yargs#2509

Resolves or fixes issue: #1458

AI Tool Disclosure

• My contribution does not include any AI-generated content
• My contribution includes AI-generated content, as disclosed below:
  • AI Tools: [e.g. GitHub CoPilot, ChatGPT, JetBrains Junie etc.]
  • LLMs and versions: [e.g. GPT-4.1, Claude Haiku 4.5, Gemini 2.5 Pro etc.]
  • Prompts: [Summarize the key prompts or instructions given to the AI tools]

Affirmation

• My code follows the CONTRIBUTING.md guidelines

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

🟢 Metrics 0 complexity · 0 duplication

Metric	Results
Complexity	✅ 0 (≤ 20 complexity)
Duplication	0

View in Codacy

🟢 Coverage ∅ diff coverage · +0.13% coverage variation

Metric	Results
Coverage variation	✅ +0.13% coverage variation
Diff coverage	✅ ∅ diff coverage (80.00%)

View coverage diff in Codacy

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (41b8204)	4662	4118	88.33%
Head commit (0fa5fd5)	4662 (+0)	4124 (+6)	88.46% (+0.13%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1461)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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TIP This summary will be updated as you push new changes.}

[jkowalleck]

fails because of

• Node.js v25.7 and 26 breaks yargs v17 yargs/yargs#2509