Reduce noisy debug logs

- hotreload: only log signal file when mtime actually changes
- auth_api: only log timecost for requests taking > 1 second

ahserver/auth_api.py

@@ -174,7 +174,8 @@ class AuthAPI:
 			try:
 				ret = await handler(request)
 				t3 = time.time()
-				debug(f'timecost=client({ip}) {user} access {path} cost {t3-t1}, ({t2-t1})')
+				if t3 - t1 > 1.0:
+					debug(f'timecost=client({ip}) {user} access {path} cost {t3-t1:.3f}, ({t2-t1:.3f})')
 				return ret
 			except Exception as e:
 				t3 = time.time()

ahserver/hotreload.py

@@ -110,10 +110,9 @@ class HotReloader:
         """Check if cache invalidation signal file was updated."""
         try:
             mtime = os.path.getmtime(SIGNAL_FILE)
-            debug(f'[hot_reload] signal file mtime: {mtime}, last: {self._last_signal_mtime}')
             if mtime > self._last_signal_mtime:
                 self._last_signal_mtime = mtime
-                debug('[hot_reload] signal file changed, triggering reload')
+                debug(f'[hot_reload] signal file changed, mtime: {mtime}')
                 return True
         except OSError:
             pass