* feat(delegate): add delegation mode for host-agent driven code review
Add `ocr delegate` subcommand that provides deterministic file selection
and rule resolution without calling any LLM. This enables AI coding agents
to perform reviews themselves using OCR only for engineering scaffolding
(preview which files to review, resolve grouped rules by path).
Includes:
- `ocr delegate preview` — outputs reviewable file list with mode/ref metadata
- `ocr delegate rule <path...>` — outputs review rules grouped by content
- Claude Code plugin command (delegate-review.md)
- Skill definitions for Claude Code, Codex, and Cursor
- Unit tests for internal/delegate package
- README documentation synced across all 5 locales
* fix(delegate): group rules by source, pattern and text
GroupRules keyed groups on rule text alone, so files sharing identical
rule text but resolved from different sources or matched by different
patterns were merged into one group that kept only the first file's
Source/Pattern metadata. Use a composite (source, pattern, text) key so
each group's provenance is accurate for every file it contains.
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