refactor(agent-office): tarot 모듈 제거 (tarot-lab으로 cutover 완료)

- DELETE: app/tarot/ 디렉토리 (pipeline, prompt, schema 모듈)
- DELETE: app/routers/tarot.py (FastAPI 라우터)
- DELETE: 4개 tarot 테스트 파일 (test_tarot_*.py)
- MODIFY: app/main.py — tarot 라우터 import + register 제거
- MODIFY: app/models.py — 5개 Tarot* 클래스 제거
- MODIFY: app/config.py — 4개 TAROT_* 환경변수 제거
- MODIFY: app/db.py — 6개 tarot_readings CRUD 함수 제거

KEEP:
- tarot_readings CREATE TABLE 블록 (DB 호환성)
- CREATE INDEX ... tarot_readings 인덱스 2개
- scripts/migrate_tarot_to_lab.py (cutover 마이그레이션)
- tests/test_migrate_tarot.py (마이그레이션 테스트)

테스트: 88 pass (migrate_tarot tests 포함)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

agent-office/app/routers/tarot.py

@@ -1,70 +0,0 @@
-"""Tarot Lab 엔드포인트 — interpret + readings CRUD."""
-from fastapi import APIRouter, HTTPException
-
-from ..models import (
-    TarotInterpretRequest,
-    TarotInterpretResponse,
-    TarotSaveRequest,
-    TarotPatchRequest,
-)
-from ..tarot import pipeline
-from .. import db as db_module
-
-
-router = APIRouter(prefix="/api/agent-office/tarot")
-
-
-@router.post("/interpret", response_model=TarotInterpretResponse)
-async def interpret_endpoint(req: TarotInterpretRequest):
-    try:
-        result = await pipeline.interpret(req)
-    except pipeline.TarotError as e:
-        raise HTTPException(status_code=500, detail=str(e)) from e
-    return result
-
-
-@router.post("/readings")
-async def save_reading(req: TarotSaveRequest):
-    rid = db_module.save_tarot_reading(req.model_dump())
-    row = db_module.get_tarot_reading(rid)
-    return {"id": rid, "created_at": row["created_at"]}
-
-
-@router.get("/readings")
-async def list_readings(
-    page: int = 1,
-    size: int = 20,
-    favorite: bool | None = None,
-    spread_type: str | None = None,
-    category: str | None = None,
-):
-    return db_module.list_tarot_readings(
-        page=page, size=size,
-        favorite=favorite, spread_type=spread_type, category=category,
-    )
-
-
-@router.get("/readings/{reading_id}")
-async def get_reading(reading_id: int):
-    row = db_module.get_tarot_reading(reading_id)
-    if not row:
-        raise HTTPException(status_code=404, detail="reading not found")
-    return row
-
-
-@router.patch("/readings/{reading_id}")
-async def patch_reading(reading_id: int, req: TarotPatchRequest):
-    row = db_module.get_tarot_reading(reading_id)
-    if not row:
-        raise HTTPException(status_code=404, detail="reading not found")
-    db_module.update_tarot_reading(reading_id, **req.model_dump(exclude_none=True))
-    return {"ok": True}
-
-
-@router.delete("/readings/{reading_id}")
-async def delete_reading(reading_id: int):
-    row = db_module.get_tarot_reading(reading_id)
-    if not row:
-        raise HTTPException(status_code=404, detail="reading not found")
-    db_module.delete_tarot_reading(reading_id)
-    return {"ok": True}