Publish SkillSpector 2.5.0 execution accounting

[keshprad]

Summary

• Publish the sanitized SkillSpector 2.5.0 snapshot.
• Add execution ledger and completeness reporting, with JSON guidance for blocking unreliable scans.
• Update the public baseline v2 documentation and preserve GitHub workflows.

Snapshot safeguards

• Retains public GitHub workflows, public documentation, the changelog, and the 2.5.0 release notes.
• Excludes internal release tooling, internal provider implementation, and implementation-planning documents.

Verification

• Internal main CI passed lint, unit, integration, Docker smoke, and Sonar.
• Snapshot integrity, public-reference, and diff checks passed.
• Local tests were not rerun because the latest main CI is green.