feat(ai): MCP tools for the Infrastructure pages (list_infra, inspect_infra) - #1387

🟢 Confidence 9/10 · safe to merge
The one open finding is fixed and pinned by a test that fails without the namespace key; the four files changed since the last review were read in full.
_{quality 100/100 · no findings · tests covered · risk low · 1/1 new units observable}

The last commit fixes podRestarts summing same-named pods across namespaces: the query now groups by namespace and the list keys on namespace plus pod name, with a test that fails without it. The changed files are safe to merge; none of the open registry errors touch this diff.

• podRestartsQuery selects and groups by k8s.namespace.name
• podKey matches restarts to a pod by namespace and name
• Infra fixture answers restarts per namespace

Fixed since the last review

• ✅ F1 · podRestarts sums restarts across namespaces by pod name

Production impact

_{d8c5987 · Updated on every push. Reply "won't fix" to dismiss a finding, or mention @maple-review-bot to ask about one.}