feat: MTG database integration with Redis caching

- Added MTG card ORM models (mtg_cards, mtg_sets tables)
- Created card_database service with search, get_by_name, get_by_set
- Added Redis client with caching layer (3600s TTL default)
- Created card router with caching on all endpoints:
  - Search cards (5min cache)
  - Get card by name (10min cache)
  - Get cards by set (15min cache)
  - Get card types/rarities (30min cache)
  - Get sets (1hr cache)
  - Get statistics (1hr cache)
- Updated settings.py:
  - Added JWT_SECRET_KEY field
  - Added DB_CONFIG and REDIS_CONFIG dictionaries
- Updated security.py to use JWT_SECRET_KEY with fallback
- Updated auth.py to use timezone-aware datetimes
- Updated refresh_mtg.py to use settings instead of os.environ
- Updated mtg_monitor.py to use settings for connections
- Added services package with __init__.py

All 20 tests passing.

backend/app/core/settings.py

@@ -13,12 +13,16 @@ class Settings(BaseSettings):
     
     # Application
     APP_NAME: str = "Cockatrice Web"
-    APP_VERSION: str = "0.1.0"
+    APP_VERSION: str = "0.2.0"
     DEBUG: bool = False
     SECRET_KEY: str = "change-me-in-production"
+    JWT_SECRET_KEY: str = "change-me-in-production"
     
-    # Database
-    DATABASE_URL: str = "postgresql+asyncpg://cockatrice:cockatrice@localhost:5432/cockatrice"
+    # Database - Primary (cockatrice app)
+    DATABASE_URL: str = "postgresql+asyncpg://cockatrice:cockatrice_pass@localhost:5432/cockatrice"
+    
+    # Database - Secondary (mtgjson data)
+    MTG_DATABASE_URL: str = "postgresql+asyncpg://cockatrice:cockatrice_pass@localhost:5432/mtgdata"
     
     # Redis
     REDIS_URL: str = "redis://localhost:6379/0"
@@ -29,7 +33,7 @@ class Settings(BaseSettings):
     JWT_REFRESH_TOKEN_EXPIRE_DAYS: int = 7
     
     # CORS
-    CORS_ORIGINS: list[str] = ["http://localhost:3000", "http://localhost:8080"]
+    CORS_ORIGINS: list[str] = ["http://localhost:3000", "http://localhost:8000"]
     
     # Email (for password reset, account activation)
     SMTP_HOST: Optional[str] = None
@@ -43,9 +47,31 @@ class Settings(BaseSettings):
     MAX_LOGIN_ATTEMPTS: int = 5
     LOGIN_BLOCK_MINUTES: int = 15
     
+    # MTG Data Refresh
+    MTG_REFRESH_INTERVAL_DAYS: int = 7
+    DATA_DIR: str = "/app/data"
+    UPLOAD_DIR: str = "/app/uploads"
+    
+    # Database configuration
+    DB_CONFIG: dict = {
+        "engine": "postgresql+asyncpg",
+        "user": "cockatrice",
+        "password": "cockatrice_pass",
+        "host": "postgres",
+        "port": 5432,
+    }
+    
+    # Redis configuration
+    REDIS_CONFIG: dict = {
+        "host": "redis",
+        "port": 6379,
+        "db": 0,
+    }
+    
     class Config:
         env_file = ".env"
         env_file_encoding = "utf-8"
+        extra = "allow"  # Allow extra env vars
 
 
 @lru_cache()