feat(ai_news): telegram includes article mapping stats line

stock-lab/app/screener/ai_news/telegram.py

@@ -37,6 +37,7 @@ def build_message(
     top_neg: List[Dict[str, Any]],
     tokens_input: int,
     tokens_output: int,
+    mapping: Dict[str, int] | None = None,
 ) -> str:
     lines: List[str] = [
         f"🌅 *AI 뉴스 분석* \\({_escape(asof)} 08:00\\)",
@@ -57,9 +58,16 @@ def build_message(
         lines.append(_escape("- (없음)"))
 
     cost = _cost_won(tokens_input, tokens_output)
+    mapping_part = ""
+    if mapping:
+        mapping_part = (
+            f"매핑 {mapping['hit_tickers']}/100 ticker "
+            f"\\({mapping['matched_pairs']}쌍 / articles {mapping['total_articles']}건\\) · "
+        )
     lines += [
         "",
-        f"_분석: 시총 상위 100종목 · 토큰 {tokens_input:,} in / {tokens_output:,} out · "
+        f"_분석: 시총 상위 100종목 · {mapping_part}"
+        f"토큰 {tokens_input:,} in / {tokens_output:,} out · "
         f"약 ₩{cost:,}_",
     ]
     return "\n".join(lines)

stock-lab/tests/test_ai_news_telegram.py

@@ -53,3 +53,27 @@ def test_build_message_empty_lists():
     # 빈 리스트라도 헤더는 있어야 함
     assert "호재 Top" in msg
     assert "악재 Top" in msg
+
+
+def test_build_message_includes_mapping_line():
+    msg = tg.build_message(
+        asof="2026-05-14",
+        top_pos=[_row("005930", 8.5, "HBM 호재")],
+        top_neg=[],
+        tokens_input=1000, tokens_output=200,
+        mapping={"total_articles": 35, "matched_pairs": 50, "hit_tickers": 42},
+    )
+    assert "매핑" in msg
+    assert "42" in msg
+    assert "50" in msg
+    assert "35" in msg
+
+
+def test_build_message_without_mapping_omits_line():
+    msg = tg.build_message(
+        asof="2026-05-14",
+        top_pos=[],
+        top_neg=[],
+        tokens_input=1000, tokens_output=200,
+    )
+    assert "매핑" not in msg