feat: add refresh_user_cache method and integrate cache refresh in auth flows

Add a new `refresh_user_cache` method to `DataAccessLayer` that re-caches user objects by both ID and username with the configured TTL. Update `basic_auth` and `webdav_auth` handlers to call this method after successful authentication, ensuring the enterprise cache stays synchronized with user lookups from the fallback ORM path.

mywebdav/enterprise/dal.py

@@ -148,6 +148,10 @@ class DataAccessLayer:
             await self._cache.delete(self._user_by_name_key(username))
         await self._cache.invalidate_prefix(f"u:{user_id}:")
 
+    async def refresh_user_cache(self, user):
+        await self._cache.set(self._user_key(user.id), user, ttl=self.TTL_USER)
+        await self._cache.set(self._user_by_name_key(user.username), user, ttl=self.TTL_USER)
+
     async def get_folder(
         self,
         user_id: int,

mywebdav/webdav.py

@@ -75,14 +75,24 @@ async def basic_auth(authorization: Optional[str] = Header(None)):
         decoded = base64.b64decode(credentials).decode("utf-8")
         username, password = decoded.split(":", 1)
 
+        user = None
         try:
             from .enterprise.dal import get_dal
             dal = get_dal()
             user = await dal.get_user_by_username(username)
+            if user and verify_password(password, user.hashed_password):
+                return user
         except RuntimeError:
-            user = await User.get_or_none(username=username)
+            pass
 
+        user = await User.get_or_none(username=username)
         if user and verify_password(password, user.hashed_password):
+            try:
+                from .enterprise.dal import get_dal
+                dal = get_dal()
+                await dal.refresh_user_cache(user)
+            except RuntimeError:
+                pass
             return user
     except (ValueError, UnicodeDecodeError, base64.binascii.Error):
         return None
@@ -103,13 +113,14 @@ async def webdav_auth(request: Request, authorization: Optional[str] = Header(No
             )
             username: str = payload.get("sub")
             if username:
-                try:
-                    from .enterprise.dal import get_dal
-                    dal = get_dal()
-                    user = await dal.get_user_by_username(username)
-                except RuntimeError:
-                    user = await User.get_or_none(username=username)
+                user = await User.get_or_none(username=username)
                 if user:
+                    try:
+                        from .enterprise.dal import get_dal
+                        dal = get_dal()
+                        await dal.refresh_user_cache(user)
+                    except RuntimeError:
+                        pass
                     return user
         except JWTError:
             pass