Add two structured fields, category and severity, to every review finding
so CI integrations can sort, group, filter, or gate builds without
re-parsing natural-language comment text.
- Tool schema (tools.json): add category/severity as enum-constrained,
required properties of code_comment. severity is limited to
critical/high/medium/low (info dropped, since LLMs struggle to
distinguish low from info).
- System prompt (task_template.json) is intentionally left untouched to
avoid the review-quality regression observed on the benchmark suite;
the tool schema alone drives field population.
- JSON output: category/severity are flat siblings of content/start_line,
omitted entirely when empty (backward compatible).
- CLI output: render an inline [category - severity] badge before the
comment, colored by severity.
- Sync docs across all five README locales.
Add integration-style tests with fake LLM clients for agent dispatch and
llmloop runner, plus new unit test files for gitcmd, session/history,
tool/code_comment, tool/filereader_read, and viewer/store packages.
