feat(backend): T1.1 认证与权限 — 注册/登录/刷新/获取用户

- 后端：auth 路由（register/login/refresh/me）+ JWT + bcrypt 密码哈希
- 依赖注入：get_current_user + require_role 角色权限校验
- 跨数据库兼容：JSONBType（PG 用 JSONB，SQLite 用 JSON）
- 测试：11 个认证测试 + 4 个健康检查测试 = 15 passed

backend/app/models/report.py

@@ -7,10 +7,10 @@ import uuid
 from datetime import datetime, timezone
 
 from sqlalchemy import DateTime, ForeignKey, Integer, String, Text
-from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.core.database import Base
+from app.core.types import JSONBType
 
 
 class MonthlyReport(Base):
@@ -27,9 +27,9 @@ class MonthlyReport(Base):
         comment="状态：draft/submitted/ai_parsed/reviewed",
     )
     raw_content: Mapped[str | None] = mapped_column(Text, nullable=True, comment="原始内容")
-    structured_data: Mapped[dict | None] = mapped_column(JSONB, nullable=True, comment="结构化指标数据")
+    structured_data: Mapped[dict | None] = mapped_column(JSONBType, nullable=True, comment="结构化指标数据")
     ai_summary: Mapped[str | None] = mapped_column(Text, nullable=True, comment="AI 生成的摘要")
-    ai_concerns: Mapped[dict | None] = mapped_column(JSONB, nullable=True, comment="AI 关注点列表")
+    ai_concerns: Mapped[dict | None] = mapped_column(JSONBType, nullable=True, comment="AI 关注点列表")
     submitted_by: Mapped[str | None] = mapped_column(String(36), ForeignKey("users.id"), nullable=True)
     submitted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
     reviewed_by: Mapped[str | None] = mapped_column(String(36), ForeignKey("users.id"), nullable=True)