feat(家庭成员): 添加家庭成员模型并关联感悟和计划

添加家庭成员模型(FamilyMember)并关联到感悟记录(InsightRecord)和今日计划(TodayPlan)
修改相关表单、视图和模板以支持发言人功能
添加数据库迁移文件和初始化脚本
更新报告模板显示发言人信息

verify_db.py

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+import sqlite3
+conn = sqlite3.connect('db.sqlite3')
+cursor = conn.cursor()
+cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name LIKE 'core_%' ORDER BY name;")
+print("Tables:", [r[0] for r in cursor.fetchall()])
+cursor.execute("SELECT COUNT(*) FROM core_familymember;")
+print("Family members count:", cursor.fetchone()[0])
+cursor.execute("SELECT sql FROM sqlite_master WHERE type='table' AND name='core_insightrecord';")
+print("InsightRecord schema:", cursor.fetchone()[0])
+conn.close()