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/project.py

@@ -2,7 +2,7 @@ import uuid
 from typing import TYPE_CHECKING
 
 from sqlalchemy import ForeignKey, String, Text
-from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy import Uuid as UUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from src.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
@@ -18,9 +18,9 @@ class Project(UUIDPrimaryKeyMixin, TimestampMixin, Base):
 
     name: Mapped[str] = mapped_column(String(255))
     description: Mapped[str | None] = mapped_column(Text, nullable=True)
-    owner_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
+    owner_id: Mapped[uuid.UUID] = mapped_column(UUID(), ForeignKey("users.id"), nullable=False)
     default_ssh_key_id: Mapped[uuid.UUID | None] = mapped_column(
-        UUID(as_uuid=True),
+        UUID(),
         ForeignKey("ssh_keys.id"),
         nullable=True,
     )