新增用户注册功能

backend/alembic/versions/20240501_000001_create_users_table.py

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+"""create users table with review status"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = "20240501_000001"
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+user_role_enum = sa.Enum("ADMIN", "PM", "CRA", "PV", "IMP", name="user_role")
+user_status_enum = sa.Enum("PENDING", "ACTIVE", "REJECTED", "DISABLED", name="user_status")
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    user_role_enum.create(bind, checkfirst=True)
+    user_status_enum.create(bind, checkfirst=True)
+    op.create_table(
+        "users",
+        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True, nullable=False),
+        sa.Column("email", sa.String(length=255), nullable=False),
+        sa.Column("password_hash", sa.String(length=255), nullable=False),
+        sa.Column("full_name", sa.String(length=255), nullable=False),
+        sa.Column("role", user_role_enum, nullable=False),
+        sa.Column("department", sa.String(length=255), nullable=False),
+        sa.Column("status", user_status_enum, nullable=False, server_default="PENDING"),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            nullable=False,
+            server_default=sa.text("now()"),
+        ),
+        sa.Column("approved_by", postgresql.UUID(as_uuid=True), sa.ForeignKey("users.id"), nullable=True),
+        sa.Column("approved_at", sa.DateTime(timezone=True), nullable=True),
+    )
+    op.create_index("ix_users_email", "users", ["email"], unique=True)
+
+
+def downgrade() -> None:
+    op.drop_index("ix_users_email", table_name="users")
+    op.drop_table("users")
+    bind = op.get_bind()
+    user_role_enum.drop(bind, checkfirst=True)
+    user_status_enum.drop(bind, checkfirst=True)

backend/alembic/versions/20240501_000002_add_avatar_to_users.py

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+"""add avatar_url to users"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = "20240501_000002"
+down_revision = "20240501_000001"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("users", sa.Column("avatar_url", sa.String(length=500), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("users", "avatar_url")