refactor: web-ai V1 assets → signal_v1/ (graduation prep)

Atomic mv of root V1 assets (main_server.py + modules/ + data/ +
tests/ + entry scripts + docs + logs) into signal_v1/ subdirectory.
load_dotenv() updated to load web-ai/.env explicitly via Path.

Adds web-ai/CLAUDE.md (workspace guide) and web-ai/start.bat
(signal_v1 entry wrapper). Prepares for signal_v2/ Phase 2.

Tests: signal_v1/tests/unit baseline preserved (no regression).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

signal_v1/modules/services/telegram.py

@@ -0,0 +1,34 @@
+import requests
+import os
+import threading
+
+from modules.config import Config
+
+class TelegramMessenger:
+    def __init__(self, token=None, chat_id=None):
+        # 환경 변수에서 로드하거나 인자로 받음
+        self.token = token or Config.TELEGRAM_BOT_TOKEN
+        self.chat_id = chat_id or Config.TELEGRAM_CHAT_ID
+        
+        if not self.token or not self.chat_id:
+            print("⚠️ [Telegram] Token or Chat ID not found.")
+
+    def send_message(self, message):
+        """별도 스레드로 메시지를 전송하여 메인 루프 블로킹 방지"""
+        if not self.token or not self.chat_id:
+            return
+            
+        def _send():
+            url = f"https://api.telegram.org/bot{self.token}/sendMessage"
+            payload = {
+                "chat_id": self.chat_id,
+                "text": message,
+                "parse_mode": "HTML"
+            }
+            try:
+                requests.post(url, json=payload, timeout=5)
+            except Exception as e:
+                print(f"⚠️ [Telegram] Error: {e}")
+        
+        # 스레드 실행 (Fire-and-forget)
+        threading.Thread(target=_send, daemon=True).start()