Initial commit: clean project structure

- Backend: FastAPI + SQLAlchemy + Celery (Python 3.11+)
- Frontend: Vue 3 + TypeScript + Pinia + Tailwind
- Admin Frontend: separate Vue 3 app for management
- Docker Compose: 9 services orchestration
- Specs: design prototypes, memory system PRD, product roadmap

Cleanup performed:
- Removed temporary debug scripts from backend root
- Removed deprecated admin_app.py (embedded UI)
- Removed duplicate docs from admin-frontend
- Updated .gitignore for Vite cache and egg-info

backend/alembic/versions/0003_add_provider_monitoring_tables.py

@@ -0,0 +1,100 @@
+"""add provider monitoring tables
+
+Revision ID: 0003_add_monitoring
+Revises: 0002_add_api_key
+Create Date: 2025-01-01
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "0003_add_monitoring"
+down_revision = "0002_add_api_key"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # 创建 provider_metrics 表
+    op.create_table(
+        "provider_metrics",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("provider_id", sa.String(length=36), nullable=False),
+        sa.Column(
+            "timestamp",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("now()"),
+            nullable=True,
+        ),
+        sa.Column("success", sa.Boolean(), nullable=False),
+        sa.Column("latency_ms", sa.Integer(), nullable=True),
+        sa.Column("cost_usd", sa.Numeric(precision=10, scale=6), nullable=True),
+        sa.Column("error_message", sa.Text(), nullable=True),
+        sa.Column("request_id", sa.String(length=100), nullable=True),
+        sa.ForeignKeyConstraint(
+            ["provider_id"],
+            ["providers.id"],
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(
+        "ix_provider_metrics_provider_id",
+        "provider_metrics",
+        ["provider_id"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_provider_metrics_timestamp",
+        "provider_metrics",
+        ["timestamp"],
+        unique=False,
+    )
+
+    # 创建 provider_health 表
+    op.create_table(
+        "provider_health",
+        sa.Column("provider_id", sa.String(length=36), nullable=False),
+        sa.Column("is_healthy", sa.Boolean(), server_default=sa.text("true"), nullable=True),
+        sa.Column("last_check", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("consecutive_failures", sa.Integer(), server_default=sa.text("0"), nullable=True),
+        sa.Column("last_error", sa.Text(), nullable=True),
+        sa.ForeignKeyConstraint(
+            ["provider_id"],
+            ["providers.id"],
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("provider_id"),
+    )
+
+    # 创建 provider_secrets 表
+    op.create_table(
+        "provider_secrets",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("name", sa.String(length=100), nullable=False),
+        sa.Column("encrypted_value", sa.Text(), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("now()"),
+            nullable=True,
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("now()"),
+            nullable=True,
+        ),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("name"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("provider_secrets")
+    op.drop_table("provider_health")
+    op.drop_index("ix_provider_metrics_timestamp", table_name="provider_metrics")
+    op.drop_index("ix_provider_metrics_provider_id", table_name="provider_metrics")
+    op.drop_table("provider_metrics")