Build Taxonomy Workbench

[Spbd1]

Motivation

• Provide a Chrome-first workbench for inspecting, searching, filtering, validating, importing/exporting, and activating/deactivating taxonomy entries.
• Surface coverage and quality reports to support safe rollout of taxonomy changes.
• Make import/export and activation operations safe for local YAML-backed workflows by creating timestamped backups before changing files.

Description

• Add full taxonomy browsing/search/filter/detail API and response schemas with endpoints: GET /taxonomy, GET /taxonomy/{risk_id}, GET /taxonomy/search, GET /taxonomy/categories, and GET /taxonomy/summary (backend files: backend/app/api/routes_taxonomy.py, backend/app/schemas/taxonomy.py, backend/app/services/taxonomy_service.py).
• Implement workbench endpoints for packs, coverage, quality report, validation, Excel import/export, and activation updates: GET /taxonomy-workbench/packs, GET /taxonomy-workbench/coverage, GET /taxonomy-workbench/quality-report, POST /taxonomy-workbench/validate, POST /taxonomy-workbench/import-excel, GET /taxonomy-workbench/export-excel, and PATCH /taxonomy-workbench/entries/{risk_id}/activation (backend files: backend/app/api/routes_taxonomy_workbench.py, backend/app/schemas/taxonomy_workbench.py, backend/app/services/taxonomy_workbench_service.py).
• Add taxonomy indexer, search/filter/faceting helpers and a quality/coverage audit engine used by the workbench (engine files: engine/argument_risk_engine/taxonomy/indexer.py, engine/argument_risk_engine/taxonomy/quality_audit.py).
• Implement safe import/export: Excel import reads workbook, validates, writes YAML packs and creates timestamped backups; export returns downloadable .xlsx generated from current pack (import/export implemented in workbench service and engine exporter/importer).
• Implement activation changes that mutate the appropriate local YAML pack file with a timestamped backup created beforehand; changes update in-memory active pack when the modified file is the active pack.
• Frontend: add Chrome UI components for taxonomy and workbench including TaxonomyPage, TaxonomyTable, TaxonomyFilters, TaxonomyDetailDrawer, and workbench panels for import/export, quality, coverage, and activation (files under frontend/src/components/taxonomy* and frontend/src/components/taxonomy_workbench/*), plus client API methods (frontend/src/api/client.ts, frontend/src/api/types.ts) and styling (frontend/src/styles/global.css).
• Minor infra updates: test client / FastAPI test stub improvements to support file uploads and response headers, and python-multipart added to pyproject.toml to support real FastAPI uploads.

Testing

• Ran the full Python test suite with pytest -q, all tests passed (17 passed, 3 warnings).
• Built the frontend with npm run build --prefix frontend, which produced the dist build successfully.
• Ran static checks with python -m ruff check ... over the modified backend/engine/test files and fixed import/style issues; ruff checks passed.
• Exercised key API flows with the test client (list/search/detail/summary, workbench packs/coverage/quality validation, export download, and activation patch) during automated tests which succeeded.

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Codex Task