feat: 初始化考培练系统项目

- 从服务器拉取完整代码
- 按框架规范整理项目结构
- 配置 Drone CI 测试环境部署
- 包含后端(FastAPI)、前端(Vue3)、管理端

技术栈: Vue3 + TypeScript + FastAPI + MySQL

backend/migrations/versions/20250922_add_positions_table.py

@@ -0,0 +1,55 @@
+"""
+add positions table
+
+Revision ID: 20250922_add_positions
+Revises: 20250921_align_schema_to_design
+Create Date: 2025-09-22
+"""
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy import inspect
+
+
+# revision identifiers, used by Alembic.
+revision = "20250922_add_positions"
+down_revision = "20250921_align_schema_to_design"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    inspector = inspect(bind)
+
+    if not inspector.has_table("positions"):
+        op.create_table(
+            "positions",
+            sa.Column("id", sa.Integer(), primary_key=True),
+            sa.Column("name", sa.String(length=100), nullable=False),
+            sa.Column("code", sa.String(length=100), nullable=False, unique=True),
+            sa.Column("description", sa.Text(), nullable=True),
+            sa.Column("parent_id", sa.Integer(), sa.ForeignKey("positions.id", ondelete="SET NULL"), nullable=True),
+            sa.Column("status", sa.String(length=20), nullable=False, server_default="active"),
+            sa.Column("is_deleted", sa.Boolean(), nullable=False, server_default=sa.false()),
+            sa.Column("deleted_at", sa.DateTime(), nullable=True),
+            sa.Column("created_by", sa.Integer(), nullable=True),
+            sa.Column("updated_by", sa.Integer(), nullable=True),
+            sa.Column("created_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+            sa.Column("updated_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+        )
+
+    # 创建索引（若不存在）
+    try:
+        indexes = [ix.get("name") for ix in inspector.get_indexes("positions")]  # type: ignore
+    except Exception:
+        indexes = []
+    if "ix_positions_name" not in indexes:
+        op.create_index("ix_positions_name", "positions", ["name"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index("ix_positions_name", table_name="positions")
+    op.drop_table("positions")
+
+