Add comprehensive test suite and utilities for user functionality

This commit introduces a suite of tests for user models, schemas, CRUD operations, and authentication services. It also adds utilities for in-memory database setup to support these tests and updates environment settings for consistency.

backend/app/alembic/versions/38bf9e7e74b3_add_all_initial_models.py

@@ -0,0 +1,46 @@
+"""Add all initial models
+
+Revision ID: 38bf9e7e74b3
+Revises: 7396957cbe80
+Create Date: 2025-02-28 09:19:33.212278
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = '38bf9e7e74b3'
+down_revision: Union[str, None] = '7396957cbe80'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+
+    op.create_table('users',
+    sa.Column('email', sa.String(), nullable=False),
+    sa.Column('password_hash', sa.String(), nullable=False),
+    sa.Column('first_name', sa.String(), nullable=False),
+    sa.Column('last_name', sa.String(), nullable=True),
+    sa.Column('phone_number', sa.String(), nullable=True),
+    sa.Column('is_active', sa.Boolean(), nullable=False),
+    sa.Column('is_superuser', sa.Boolean(), nullable=False),
+    sa.Column('preferences', sa.JSON(), nullable=True),
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_users_email'), 'users', ['email'], unique=True)
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_users_email'), table_name='users')
+    op.drop_table('users')
+    # ### end Alembic commands ###