Add GitHub Actions validate workflow and refresh audit artifacts

[Emily2040]

Motivation

• The repository lacked a CI workflow to run the built-in repository validator, leaving validation dependent on local environments.
• The audit needed a dated, concrete record of checks and command-level evidence and a remediation path that executes in CI.

Description

• Add .github/workflows/validate.yml to run the validator on push and pull_request using Python 3.11 and install pyyaml and jsonschema before executing python scripts/validate_repo.py.
• Rewrite AUDIT_REPORT.md with a dated full-audit summary, findings, remediation applied, and post-remediation status.
• Rewrite AUDIT_COMMAND_OUTPUTS.md to capture command-by-command outputs from the audit run, including failure modes observed in the current environment.

Testing

• Attempted to run python scripts/validate_repo.py locally which failed due to missing PyYAML in the runtime environment.
• Attempted python -m pip install --user pyyaml jsonschema which failed in this environment due to network/proxy restrictions.
• Required-file presence checks that include the new workflow passed after remediation.
• Static scans including placeholder scan with rg, cache artifact scan with find, wrapper-to-SKILL.md checks, and internal markdown link checks for README.md and SKILL.md all passed in this environment.

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Remove placeholder tokens from audit command transcript

scripts/validate_repo.py's validate_placeholders() check scans every *.md file for your-org|your-repo|example\.com|your-username|openai, and this newly added command line includes those exact tokens, so the validator will always emit Placeholder-like text found in AUDIT_COMMAND_OUTPUTS.md once dependencies are available. Because .github/workflows/validate.yml now runs that validator on every PR/push, this makes the new CI workflow fail deterministically.

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