feat(family): deploy Single-Writer DuckDB backend, Mila parent cockpit & feeding analytics, and Moritz macro tracker

projects/duckdb-backend/app/routes/query.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+import time
+from fastapi import APIRouter, Depends, HTTPException, Request
+
+from app.engine import DuckDBEngine
+from app.models import QueryRequest, QueryResponse
+
+router = APIRouter(tags=["Generic Queries"])
+
+
+def get_engine(request: Request) -> DuckDBEngine:
+    return request.app.state.engine
+
+
+@router.post("/query", response_model=QueryResponse)
+async def execute_query(
+    req: QueryRequest,
+    engine: DuckDBEngine = Depends(get_engine),
+) -> QueryResponse:
+    t0 = time.perf_counter()
+    try:
+        rows = engine.query(req.query, req.params)
+        duration_ms = round((time.perf_counter() - t0) * 1000, 2)
+        cols = list(rows[0].keys()) if rows else []
+        return QueryResponse(
+            columns=cols,
+            rows=rows,
+            count=len(rows),
+            execution_time_ms=duration_ms,
+        )
+    except ValueError as ve:
+        raise HTTPException(status_code=400, detail=str(ve))
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))