부동산 청약 단지 관리 API 추가

- realestate_complexes 테이블 추가 (lotto.db)
- CRUD 엔드포인트 4개: GET/POST /api/realestate/complexes, PUT/DELETE /api/realestate/complexes/:id
- status: 청약예정|청약중|결과발표|완료, priority: high|normal|low 검증

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

backend/app/main.py

@@ -14,6 +14,8 @@ from .db import (
     get_all_todos, create_todo, update_todo, delete_todo, delete_done_todos,
     # blog
     get_all_posts, create_post, update_post, delete_post,
+    # realestate
+    get_all_complexes, get_complex, create_complex, update_complex, delete_complex,
 )
 from .recommender import recommend_numbers, recommend_with_heatmap
 from .collector import sync_latest, sync_ensure_all
@@ -670,3 +672,82 @@ def api_blog_delete(post_id: int):
     if not ok:
         raise HTTPException(status_code=404, detail="Post not found")
     return {"ok": True}
+
+
+# ── RealEstate API ─────────────────────────────────────────────────────────────
+
+VALID_STATUSES = {"청약예정", "청약중", "결과발표", "완료"}
+VALID_PRIORITIES = {"high", "normal", "low"}
+
+
+class ComplexCreate(BaseModel):
+    name: str
+    address: str = ""
+    lat: Optional[float] = None
+    lng: Optional[float] = None
+    units: Optional[int] = None
+    types: List[str] = []
+    avgPricePerPyeong: Optional[int] = None
+    subscriptionStart: Optional[str] = None
+    subscriptionEnd: Optional[str] = None
+    resultDate: Optional[str] = None
+    status: str = "청약예정"
+    priority: str = "normal"
+    tags: List[str] = []
+    naverUrl: str = ""
+    floorPlanUrl: str = ""
+    memo: str = ""
+
+
+class ComplexUpdate(BaseModel):
+    name: Optional[str] = None
+    address: Optional[str] = None
+    lat: Optional[float] = None
+    lng: Optional[float] = None
+    units: Optional[int] = None
+    types: Optional[List[str]] = None
+    avgPricePerPyeong: Optional[int] = None
+    subscriptionStart: Optional[str] = None
+    subscriptionEnd: Optional[str] = None
+    resultDate: Optional[str] = None
+    status: Optional[str] = None
+    priority: Optional[str] = None
+    tags: Optional[List[str]] = None
+    naverUrl: Optional[str] = None
+    floorPlanUrl: Optional[str] = None
+    memo: Optional[str] = None
+
+
+@app.get("/api/realestate/complexes")
+def api_realestate_list():
+    return get_all_complexes()
+
+
+@app.post("/api/realestate/complexes", status_code=201)
+def api_realestate_create(body: ComplexCreate):
+    if body.status not in VALID_STATUSES:
+        raise HTTPException(status_code=400, detail=f"status must be one of {VALID_STATUSES}")
+    if body.priority not in VALID_PRIORITIES:
+        raise HTTPException(status_code=400, detail=f"priority must be one of {VALID_PRIORITIES}")
+    return create_complex(body.model_dump())
+
+
+@app.put("/api/realestate/complexes/{complex_id}")
+def api_realestate_update(complex_id: int, body: ComplexUpdate):
+    data = body.model_dump(exclude_none=True)
+    if "status" in data and data["status"] not in VALID_STATUSES:
+        raise HTTPException(status_code=400, detail=f"status must be one of {VALID_STATUSES}")
+    if "priority" in data and data["priority"] not in VALID_PRIORITIES:
+        raise HTTPException(status_code=400, detail=f"priority must be one of {VALID_PRIORITIES}")
+    updated = update_complex(complex_id, data)
+    if updated is None:
+        raise HTTPException(status_code=404, detail="Complex not found")
+    return updated
+
+
+@app.delete("/api/realestate/complexes/{complex_id}")
+def api_realestate_delete(complex_id: int):
+    ok = delete_complex(complex_id)
+    if not ok:
+        raise HTTPException(status_code=404, detail="Complex not found")
+    return {"ok": True}