refactor: remove duplicate fixtures and add SQLite support

Task 2.5: Remove duplicate fixtures from integration tests
- test_auth_api.py, test_auth_services.py, test_models.py
- test_projects_api.py, test_seed.py, test_users_api.py
- Fix npytest typos in all test files

Task 3.2: Update SQLAlchemy configuration for SQLite
- Use generic Uuid type instead of PostgreSQL-specific UUID
- Use generic JSON type instead of PostgreSQL-specific JSONB
- Update database.py to handle SQLite connection args

Unit tests now run without PostgreSQL (5/8 passing)

apps/api/src/models/user_config.py

@@ -2,7 +2,7 @@ import uuid
 from typing import TYPE_CHECKING
 
 from sqlalchemy import ForeignKey
-from sqlalchemy.dialects.postgresql import JSONB, UUID
+from sqlalchemy import JSON, Uuid as UUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from src.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
@@ -14,7 +14,7 @@ if TYPE_CHECKING:
 class UserConfig(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     __tablename__ = "user_configs"
 
-    user_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False, unique=True)
-    config: Mapped[dict[str, object]] = mapped_column(JSONB, default=dict, nullable=False)
+    user_id: Mapped[uuid.UUID] = mapped_column(UUID(), ForeignKey("users.id"), nullable=False, unique=True)
+    config: Mapped[dict[str, object]] = mapped_column(JSON, default=dict, nullable=False)
 
     user: Mapped["User"] = relationship(back_populates="user_config")