feat: 添加 Profile/Messages API 及 SSE 推送集成

- Profile API: GET/PUT /profile + PUT /profile/password
- Messages API: 模型/迁移(005)/服务/路由 + 任务操作自动创建消息
- SSE 推送集成: tasks.py 中 6 个操作触发 SSE 通知
- Alembic 迁移: 004 audit_logs + 005 messages
- env.py 导入所有模型确保迁移正确

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/alembic/versions/004_add_audit_logs.py

@@ -0,0 +1,37 @@
+"""添加审计日志表
+
+Revision ID: 004
+Revises: 003
+Create Date: 2026-02-09
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = '004'
+down_revision: Union[str, None] = '003'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        'audit_logs',
+        sa.Column('id', sa.Integer(), primary_key=True, autoincrement=True),
+        sa.Column('action', sa.String(50), nullable=False, index=True),
+        sa.Column('resource_type', sa.String(50), nullable=False, index=True),
+        sa.Column('resource_id', sa.String(64), nullable=True, index=True),
+        sa.Column('user_id', sa.String(64), nullable=True, index=True),
+        sa.Column('user_name', sa.String(255), nullable=True),
+        sa.Column('user_role', sa.String(20), nullable=True),
+        sa.Column('detail', sa.Text(), nullable=True),
+        sa.Column('ip_address', sa.String(45), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False, index=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table('audit_logs')

backend/alembic/versions/005_add_messages.py

@@ -0,0 +1,42 @@
+"""添加消息表
+
+Revision ID: 005
+Revises: 004
+Create Date: 2026-02-09
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = '005'
+down_revision: Union[str, None] = '004'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        'messages',
+        sa.Column('id', sa.String(64), primary_key=True),
+        sa.Column('user_id', sa.String(64), sa.ForeignKey('users.id', ondelete='CASCADE'), nullable=False),
+        sa.Column('type', sa.String(50), nullable=False),
+        sa.Column('title', sa.String(255), nullable=False),
+        sa.Column('content', sa.Text(), nullable=False),
+        sa.Column('is_read', sa.Boolean(), nullable=False, server_default='false'),
+        sa.Column('related_task_id', sa.String(64), nullable=True),
+        sa.Column('related_project_id', sa.String(64), nullable=True),
+        sa.Column('sender_name', sa.String(100), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index('idx_messages_user_id', 'messages', ['user_id'])
+    op.create_index('idx_messages_user_read', 'messages', ['user_id', 'is_read'])
+
+
+def downgrade() -> None:
+    op.drop_index('idx_messages_user_read', table_name='messages')
+    op.drop_index('idx_messages_user_id', table_name='messages')
+    op.drop_table('messages')