Add deterministic article search to MCP

rollcalc_mcp_tools.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 from typing import Any
 
 from roll_calculation import (
+    ArticleRepository,
     calculate_roll,
     get_article,
     transport_roll_inputs_from_roll_calculation,
@@ -20,6 +21,11 @@ def get_article_result(
     return get_article(article_number, article_name_hint)
 
 
+def search_articles_result(query: str) -> dict[str, Any]:
+    """Delegate article discovery to the shared article repository."""
+    return ArticleRepository.load().search(query)
+
+
 def calculate_roll_diameter_result(
     *,
     article_number: str | None = None,