Initial commit: Dabit Time Manager project

Python-based time management application with UDP discovery,
TCP protocol communication, time sync, and drift monitoring.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

services/time_sync_service.py

@@ -0,0 +1,38 @@
+"""전체 컨트롤러 시간 동기화 서비스"""
+
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from datetime import datetime
+
+from models.controller import Controller
+from network.tcp_protocol import sync_time
+
+
+def sync_all(
+    controllers: list[Controller],
+    max_workers: int = 8,
+) -> list[tuple[Controller, bool, str]]:
+    """선택된 컨트롤러에 일괄 시간 동기화.
+
+    Returns: [(Controller, 성공여부, 메시지), ...]
+    """
+    targets = [c for c in controllers if c.selected]
+    if not targets:
+        return []
+
+    dt = datetime.now()
+    results: list[tuple[Controller, bool, str]] = []
+
+    with ThreadPoolExecutor(max_workers=max_workers) as executor:
+        future_map = {
+            executor.submit(sync_time, c.ip, c.port, dt): c
+            for c in targets
+        }
+        for future in as_completed(future_map):
+            ctrl = future_map[future]
+            try:
+                ok, msg = future.result()
+            except Exception as e:
+                ok, msg = False, str(e)
+            results.append((ctrl, ok, msg))
+
+    return results