feat: HR Portal - Complete Multi-Tenant System with Redis Session Storage

Major Features:
- ✅ Multi-tenant architecture (tenant isolation)
- ✅ Employee CRUD with lifecycle management (onboarding/offboarding)
- ✅ Department tree structure with email domain management
- ✅ Company info management (single-record editing)
- ✅ System functions CRUD (permission management)
- ✅ Email account management (multi-account per employee)
- ✅ Keycloak SSO integration (auth.lab.taipei)
- ✅ Redis session storage (10.1.0.254:6379)
  - Solves Cookie 4KB limitation
  - Cross-system session sharing
  - Sliding expiration (8 hours)
  - Automatic token refresh

Technical Stack:
Backend:
- FastAPI + SQLAlchemy
- PostgreSQL 16 (10.1.0.20:5433)
- Keycloak Admin API integration
- Docker Mailserver integration (SSH)
- Alembic migrations

Frontend:
- Next.js 14 (App Router)
- NextAuth 4 with Keycloak Provider
- Redis session storage (ioredis)
- Tailwind CSS

Infrastructure:
- Redis 7 (10.1.0.254:6379) - Session + Cache
- Keycloak 26.1.0 (auth.lab.taipei)
- Docker Mailserver (10.1.0.254)

Architecture Highlights:
- Session管理由 Keycloak + Redis 統一控制
- 支援多系統 (HR/WebMail/Calendar/Drive/Office) 共享 session
- Token 自動刷新,異質服務整合
- 未來可無縫遷移到雲端

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend/app/models/emp_resume.py

@@ -0,0 +1,69 @@
+"""
+員工履歷資料 Model (人員基本檔)
+記錄員工的個人資料、教育背景等（與任用無關的基本資料）
+"""
+from datetime import datetime, date
+from sqlalchemy import Column, Integer, String, Boolean, Date, DateTime, Text, ForeignKey, UniqueConstraint, Index
+from sqlalchemy.orm import relationship
+
+from app.db.base import Base
+
+
+class EmpResume(Base):
+    """員工履歷表（人員基本檔）"""
+
+    __tablename__ = "tenant_emp_resumes"
+    __table_args__ = (
+        UniqueConstraint("tenant_id", "seq_no", name="uq_tenant_resume_seq"),
+        UniqueConstraint("tenant_id", "id_number", name="uq_tenant_id_number"),
+        Index("idx_emp_resume_tenant", "tenant_id"),
+    )
+
+    id = Column(Integer, primary_key=True, index=True)
+    tenant_id = Column(Integer, ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False, index=True,
+                       comment="租戶 ID")
+    seq_no = Column(Integer, nullable=False, comment="租戶內序號 (觸發器自動生成)")
+
+    # 個人基本資料
+    legal_name = Column(String(100), nullable=False, comment="法定姓名")
+    english_name = Column(String(100), nullable=True, comment="英文名稱")
+    id_number = Column(String(20), nullable=False, comment="身分證字號/護照號碼")
+    birth_date = Column(Date, nullable=True, comment="出生日期")
+    gender = Column(String(10), nullable=True, comment="性別: M/F/Other")
+    marital_status = Column(String(20), nullable=True, comment="婚姻狀況: single/married/divorced/widowed")
+    nationality = Column(String(50), nullable=True, comment="國籍")
+
+    # 聯絡資訊
+    phone = Column(String(20), nullable=True, comment="聯絡電話")
+    mobile = Column(String(20), nullable=True, comment="手機")
+    personal_email = Column(String(255), nullable=True, comment="個人郵箱")
+    address = Column(Text, nullable=True, comment="通訊地址")
+    emergency_contact = Column(String(100), nullable=True, comment="緊急聯絡人")
+    emergency_phone = Column(String(20), nullable=True, comment="緊急聯絡電話")
+
+    # 教育背景
+    education_level = Column(String(50), nullable=True, comment="學歷: high_school/bachelor/master/phd")
+    school_name = Column(String(200), nullable=True, comment="畢業學校")
+    major = Column(String(100), nullable=True, comment="主修科系")
+    graduation_year = Column(Integer, nullable=True, comment="畢業年份")
+
+    # 備註
+    notes = Column(Text, nullable=True, comment="備註")
+
+    # 通用欄位
+    is_active = Column(Boolean, default=True, nullable=False, comment="是否啟用")
+    edit_by = Column(String(100), nullable=True, comment="最後編輯者")
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False, comment="建立時間")
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False, comment="更新時間")
+
+    # 關聯
+    tenant = relationship("Tenant")
+    employment_setting = relationship(
+        "EmpSetting",
+        back_populates="resume",
+        uselist=False,
+        cascade="all, delete-orphan"
+    )
+
+    def __repr__(self):
+        return f"<EmpResume {self.legal_name} ({self.id_number})>"