build: 打通 FastAPI 与 Vue 最小工程、依赖与数据库连接

后端入口、配置、Redis 与 Alembic 迁移就位；前端 Vite 工程可安装可构建。

backend/alembic/versions/e5f6a7b8c9d0_add_customer_is_authenticated.py

@@ -0,0 +1,32 @@
+"""add customers.is_authenticated to mark integration-authenticated people
+
+Revision ID: e5f6a7b8c9d0
+Revises: d4e5f6a7b8c9
+Create Date: 2026-07-09
+
+People who were identified via POST /generate-token (the embedding app asserted a
+known customer_email) are the business's existing customers, not organic leads, and
+must be excluded from the People/leads views. This was previously inferred from
+meta_data being NULL, but SQLAlchemy stores an empty JSON value as JSON null rather
+than SQL NULL, so `meta_data IS NULL` matched nothing and hid every visitor/lead.
+Replace that heuristic with an explicit boolean flag.
+"""
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = 'e5f6a7b8c9d0'
+down_revision = 'd4e5f6a7b8c9'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        'customers',
+        sa.Column('is_authenticated', sa.Boolean(), nullable=False, server_default='false'),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column('customers', 'is_authenticated')