refactor: separate inline and context comment limits

Split REVIEW_MAX_COMMENTS into two independent variables:
- REVIEW_MAX_COMMENTS: total comments per PR (context review)
- REVIEW_MAX_INLINE_COMMENTS: comments per file (inline review)

Addresses AI reviewer feedback for independent configuration.

compose.yaml

@@ -19,8 +19,8 @@ services:
       - VCS__PROVIDER=GITEA
       - VCS__HTTP_CLIENT__API_TOKEN=${GITEA_TOKEN}
       - VCS__HTTP_CLIENT__API_URL=${GITEA_API_URL}
-      # Review Config (max comments applies to both inline per-file and context per-MR)
-      - REVIEW__MAX_INLINE_COMMENTS=${REVIEW_MAX_COMMENTS:-3}
+      # Review Config (inline=per file, context=per MR total)
+      - REVIEW__MAX_INLINE_COMMENTS=${REVIEW_MAX_INLINE_COMMENTS:-3}
       - REVIEW__MAX_CONTEXT_COMMENTS=${REVIEW_MAX_COMMENTS:-3}
     volumes:
       - xai-cache:/root/.cache