feat: CONAI Phase 1 MVP 초기 구현

소형 건설업체(100억 미만)를 위한 AI 기반 토목공사 통합관리 플랫폼

Backend (FastAPI):
- SQLAlchemy 모델 13개 (users, projects, wbs, tasks, daily_reports, reports, inspections, quality, weather, permits, rag, settings)
- API 라우터 11개 (auth, projects, tasks, daily_reports, reports, inspections, weather, rag, kakao, permits, settings)
- Services: Claude AI 래퍼, CPM Gantt 계산, 기상청 API, RAG(pgvector), 카카오 Skill API
- Alembic 마이그레이션 (pgvector 포함)
- pytest 테스트 (CPM, 날씨 경보)

Frontend (Next.js 15):
- 11개 페이지 (대시보드, 프로젝트, Gantt, 일보, 검측, 품질, 날씨, 인허가, RAG, 설정)
- TanStack Query + Zustand + Tailwind CSS

인프라:
- Docker Compose (PostgreSQL pgvector + backend + frontend)
- 한국어 README 및 설치 가이드

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

backend/app/models/daily_report.py

@@ -0,0 +1,64 @@
+import uuid
+from sqlalchemy import String, Integer, Boolean, Date, Text, ForeignKey, Enum as SAEnum
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+from app.core.database import Base
+from app.models.base import TimestampMixin, UUIDMixin
+from datetime import datetime
+import enum
+
+
+class ReportStatus(str, enum.Enum):
+    DRAFT = "draft"
+    CONFIRMED = "confirmed"
+    SUBMITTED = "submitted"
+
+
+class InputSource(str, enum.Enum):
+    KAKAO = "kakao"
+    WEB = "web"
+    API = "api"
+
+
+class DailyReport(Base, UUIDMixin, TimestampMixin):
+    __tablename__ = "daily_reports"
+
+    project_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("projects.id"), nullable=False)
+    report_date: Mapped[str] = mapped_column(Date, nullable=False, index=True)
+    weather_summary: Mapped[str | None] = mapped_column(String(100), nullable=True)
+    temperature_high: Mapped[float | None] = mapped_column(nullable=True)
+    temperature_low: Mapped[float | None] = mapped_column(nullable=True)
+    workers_count: Mapped[dict | None] = mapped_column(JSONB, nullable=True)   # {"concrete": 5, ...}
+    equipment_list: Mapped[list | None] = mapped_column(JSONB, nullable=True)  # [{"type": "backhoe", ...}]
+    work_content: Mapped[str | None] = mapped_column(Text, nullable=True)
+    issues: Mapped[str | None] = mapped_column(Text, nullable=True)
+    input_source: Mapped[InputSource] = mapped_column(
+        SAEnum(InputSource, name="input_source"), default=InputSource.WEB, nullable=False
+    )
+    raw_kakao_input: Mapped[str | None] = mapped_column(Text, nullable=True)
+    ai_generated: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    status: Mapped[ReportStatus] = mapped_column(
+        SAEnum(ReportStatus, name="daily_report_status"), default=ReportStatus.DRAFT, nullable=False
+    )
+    confirmed_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
+    confirmed_at: Mapped[datetime | None] = mapped_column(nullable=True)
+    pdf_s3_key: Mapped[str | None] = mapped_column(String(500), nullable=True)
+
+    # relationships
+    project: Mapped["Project"] = relationship("Project", back_populates="daily_reports")
+    photos: Mapped[list["DailyReportPhoto"]] = relationship(
+        "DailyReportPhoto", back_populates="daily_report", cascade="all, delete-orphan"
+    )
+    confirmed_user: Mapped["User | None"] = relationship("User", foreign_keys=[confirmed_by])
+
+
+class DailyReportPhoto(Base, UUIDMixin, TimestampMixin):
+    __tablename__ = "daily_report_photos"
+
+    daily_report_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("daily_reports.id"), nullable=False)
+    s3_key: Mapped[str] = mapped_column(String(500), nullable=False)
+    caption: Mapped[str | None] = mapped_column(String(200), nullable=True)
+    sort_order: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+
+    # relationships
+    daily_report: Mapped["DailyReport"] = relationship("DailyReport", back_populates="photos")