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/add_db_connector_row_scope.py

@@ -0,0 +1,40 @@
+"""Row-level scoping for the ticket DB connector
+
+Revision ID: add_tkt_row_scope_001
+Revises: a1dbf557bbb0
+Create Date: 2026-07-20
+
+Adds the per-table customer-column map that restricts a connector's queries to
+the ticket customer's own rows, and which customer value fills the predicate.
+Existing connectors get NULL/'email' — no scoping until an org configures it,
+so behaviour is unchanged on upgrade.
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import JSON
+
+revision = "add_tkt_row_scope_001"
+down_revision = "a1dbf557bbb0"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "ticket_db_connectors",
+        sa.Column("row_scope", JSON(), nullable=True),
+    )
+    op.add_column(
+        "ticket_db_connectors",
+        sa.Column(
+            "row_scope_key",
+            sa.String(length=20),
+            nullable=False,
+            server_default="email",
+        ),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("ticket_db_connectors", "row_scope_key")
+    op.drop_column("ticket_db_connectors", "row_scope")