docs: Documentation analysis and improvement

[github-actions]

Closes #945

Summary of files analyzed

• docs/CONTRIBUTING.md
• .github/workflows/no-test.yml
• .github/workflows/test-aws-auth.yml
• oblt-cli/deploy-my-kibana/README.md
• oblt-cli/undeploy-my-kibana/README.md
• oblt-cli/deploy-my-kibana/action.yml
• oblt-cli/undeploy-my-kibana/action.yml

Issues found

• docs/CONTRIBUTING.md: The no-test.yml guidance incorrectly said to add !<action-path>/** for actions without dedicated tests; in no-test.yml, those negated paths are exclusions for actions that already have dedicated test-*.yml workflows.
• oblt-cli/deploy-my-kibana/README.md: Authentication wording says “exactly one authentication mode,” but action validation only rejects two cases: all auth inputs empty, or all three set.
• oblt-cli/undeploy-my-kibana/README.md: Same authentication wording mismatch with current validation behavior.

Changes made

• Updated docs/CONTRIBUTING.md in the Action Testing and .github/workflows/no-test.yml sections to document the real trigger behavior:

  • no-test.yml starts from ** and exclusions (!<action-path>/**) are for actions that already have dedicated test workflows.
  • Actions without dedicated test workflows must remain included so fallback no-test provides the required test job.
  • Added a concrete dedicated-test example (aws/auth with test-aws-auth.yml) and clarified fallback behavior.

• Left oblt-cli/deploy-my-kibana/README.md and oblt-cli/undeploy-my-kibana/README.md unchanged because they are marked auto-generated (Generated by https://github.com/reakaleek/gh-action-readme). Per docs-only guardrails, those updates should be made through the readme generation source/template/hook flow rather than by hand-editing generated output.

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What is this? | From workflow: Observability Agentic Workflow Entrypoint

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[Copilot]

Pull request overview

Updates contributor documentation to accurately describe how the repository’s required test check is satisfied, clarifying the relationship between dedicated test-*.yml workflows and the fallback .github/workflows/no-test.yml workflow.

Changes:

• Clarifies that actions without dedicated test workflows should remain included in no-test.yml (via the default ** path), so the fallback no-test workflow provides the required test job.
• Corrects guidance that !<action-path>/** entries in no-test.yml are exclusions for actions with dedicated test-*.yml workflows, and adds a concrete example (aws/auth + test-aws-auth.yml).