Issue #3607816: Add a codebase metrics documentation page (cloc)

Frank Mablyrequested to merge
issue/orchestra-3607816:3607816-docs-add-a into 1.x

Adds a Codebase metrics documentation page to the mkdocs site: a measured snapshot of the codebase and all submodules, counted with cloc.

  • Lines by language, a production vs test split, the code/comment/blank composition, and a per-submodule ranking.
  • Rendered as static inline SVG charts (no JavaScript or charting plugin) plus Markdown tables, so it builds in the docs as-is. Verified with mkdocs build --strict.
  • Nav entry "Codebase metrics" added to mkdocs.yml.
  • Intended to be refreshed periodically.

Snapshot (1.x, 2026-07-02): 51,988 lines of code across 681 files; production 32,809 / test 19,179.

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