Add Ontoly Software Graph skill

[0xsarwagya]

Summary

• Add an Ontoly Software Graph skill under architecture.
• Add it to the README architecture section.
• The skill guides Codex to use Ontoly graph/MCP evidence for architecture, request tracing, dependency analysis, and impact analysis.

Validation

• git diff --check

[gemini-code-assist]

Code Review

This pull request introduces a new skill, ontoly-software-graph, which outlines how to leverage Ontoly's deterministic Software Graph and MCP capabilities for architecture review, request tracing, dependency analysis, and impact analysis. It also registers this new skill in the main README.md under the Architecture section. The review feedback suggests improving consistency with existing skills by using active, verb-first phrasing in the README.md description and updating the frontmatter description in the skill file to include a 'Use when...' statement.

Important

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