Add Data Olympus to the MCP Servers tools catalog

[ajdelaguila]

Adds Data Olympus to the MCP Servers section of the tools catalog (website/data/tools.yml).

This is the tools catalog, not the plugins/external.json marketplace, and follows the existing third-party MCP server entries (for example chatcrystal). The entry validates against .schemas/tools.schema.json and every claim comes from the project README.

• Repo: https://github.com/knaisoma/data-olympus
• License: Apache-2.0 (open source)
• Package: https://pypi.org/project/data-olympus/
• What it is: a git-native, OKF-readable knowledge-base format and single-writer MCP server for coding agents. It governs decisions rather than code, serving engineering standards, architectural decisions, and project knowledge as versioned Markdown and targeting coding-intent-to-governing-rule retrieval. It layers governance extensions on the OKF base (stable id, controlled type/status/tier, supersedes chains).

Context: an earlier issue-based request (#2254) was the wrong channel; this is the catalog data-file PR.

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