Fix undefined Player errors by moving imports to top

- Move Player, peewee_fn, model_to_dict imports to top of file
- Remove all redundant lazy imports from middle of file
- All 76 unit tests pass (9 skipped cache/auth tests)
- Fixes linter errors at lines 183, 188-194

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/services/player_service.py

@@ -6,9 +6,12 @@ Business logic for player operations with injectable dependencies.
 import logging
 from typing import List, Optional, Dict, Any, TYPE_CHECKING
 
+from peewee import fn as peewee_fn
+from playhouse.shortcuts import model_to_dict
 
 from .base import BaseService
 from .interfaces import AbstractPlayerRepository, QueryResult
+from ..db_engine import Player
 
 if TYPE_CHECKING:
     from .base import ServiceConfig
@@ -74,7 +77,6 @@ class PlayerService(BaseService):
     @classmethod
     def _get_real_repo(cls) -> 'RealPlayerRepository':
         """Get a real DB repository for production use."""
-        from ..db_engine import Player  # Lazy import to avoid loading DB in tests
         return RealPlayerRepository(Player)
     
     @classmethod
@@ -171,7 +173,6 @@ class PlayerService(BaseService):
         # Use DB-native filtering only for real Peewee models
         if first_item is not None and not isinstance(first_item, dict):
             try:
-                
                 if team_id:
                     query = query.where(Player.team_id << team_id)
                 
@@ -590,17 +591,14 @@ class RealPlayerRepository:
     
     def update(self, data: Dict, player_id: int) -> int:
         """Update player."""
-        from ..db_engine import Player  # Lazy import - only used in production
         return Player.update(**data).where(Player.id == player_id).execute()
 
     def insert_many(self, data: List[Dict]) -> int:
         """Insert multiple players."""
-        from ..db_engine import Player  # Lazy import - only used in production
         with Player._meta.database.atomic():
             Player.insert_many(data).execute()
         return len(data)
 
     def delete_by_id(self, player_id: int) -> int:
         """Delete player by ID."""
-        from ..db_engine import Player  # Lazy import - only used in production
         return Player.delete().where(Player.id == player_id).execute()