refactor: restructure core→server, split large entity files into database module

- Move src/core/ → src/server/
- Split SerieList.py (531 lines) and series.py (414 lines) into src/server/database/
- Add database/models.py for SQLAlchemy models
- Update all test imports to reflect new structure
- Remove deprecated test files (test_serie_class.py, test_serie_folder_with_year.py)

src/server/utils/dependencies.py

@@ -20,7 +20,7 @@ except Exception:  # pragma: no cover - optional dependency
     AsyncSession = object
 
 from src.config.settings import settings
-from src.core.SeriesApp import SeriesApp
+from src.server.SeriesApp import SeriesApp
 from src.server.services.auth_service import AuthError, auth_service
 
 logger = logging.getLogger(__name__)
@@ -58,16 +58,16 @@ _RATE_LIMIT_WINDOW_SECONDS = 60.0
 
 
 def _make_db_lookup():
-    """Build a synchronous ``(folder) -> Serie | None`` callable for SerieScanner.
+    """Build a synchronous ``(folder) -> AnimeSeries | None`` callable for SerieScanner.
 
     The returned function opens a short-lived sync DB session, queries for a
-    series whose ``folder`` column matches the given name, and converts the
-    ORM row to a ``Serie`` domain object.  Returns ``None`` when the DB is not
-    yet initialised or no matching row is found.
+    series whose ``folder`` column matches the given name, and returns the
+    AnimeSeries ORM object. Returns ``None`` when the DB is not yet initialised
+    or no matching row is found.
     """
-    from src.core.entities.series import Serie
+    from src.server.database.models import AnimeSeries
 
-    def _lookup(folder: str) -> Optional["Serie"]:
+    def _lookup(folder: str) -> Optional["AnimeSeries"]:
         try:
             from src.server.database.connection import get_sync_session
             from src.server.database.service import AnimeSeriesService
@@ -78,16 +78,7 @@ def _make_db_lookup():
             finally:
                 db.close()
 
-            if row is None:
-                return None
-            return Serie(
-                key=row.key,
-                name=row.name or "",
-                site=row.site,
-                folder=row.folder,
-                episodeDict={},
-                year=row.year,
-            )
+            return row
         except RuntimeError:
             # DB not initialised yet (e.g. first boot before init_db())
             return None