feat: dbt BigQuery 프로젝트 뼈대 + 로컬 stage 연결

[RimSM]

Summary

Dataform을 dbt로 전환하기 위한 첫 단계 — dbt 프로젝트 뼈대 구축.

• Medallion 구조: silver(view) / gold(table) 레이어
• 환경 분리: dev(OAuth, 스테이지) / prod(service-account 키, 운영), DBT_TARGET으로 스위칭
• GA4 소스: 환경변수(KOIN_DATA_GA4_PROJECT/DATASET)로 dev/prod 입력 스위칭. 못생긴 analytics_* 이름은 ga4 별명으로 가림
• 매크로: generate_schema_name 오버라이드로 데이터셋 이름 깔끔하게 (silver_silver 방지)
• docker-compose: dbt 서비스에 DBT_PROFILES_DIR + 로컬 gcloud ADC 마운트

확인 완료

• 로컬에서 docker compose run --rm dbt debug → stage(koin-stage-438512) 연결 성공 (All checks passed!)

배포 안전성

• dbt 컨테이너는 --version만 실행하므로 up 시 자동 실행 없음
• 기존 서비스(Airflow/Superset/Postgres/Caddy) 영향 없음
• 서버 실 작동은 후속(서비스 계정 키 + 서버 .env prod 값 + Airflow DAG) 필요

남은 작업 (별도 PR)

• 첫 silver 모델 + dbt run
• 서버 서비스 계정 키 배치
• Airflow DAG 연동

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Added dbt project configuration for managing data models, macros, tests, and seeds.
  • Added GA4 BigQuery event source definitions, including daily and intraday event data.
  • Added development and production BigQuery target configurations.
  • Configured separate silver and gold data layers with appropriate output formats.

• Chores

  • Enabled local Google Cloud authentication for dbt workflows running in Docker.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 2e366bae-2c01-47fe-a64a-8cd330f7df86

📥 Commits

Reviewing files that changed from the base of the PR and between 018f418 and 479d1c1.

📒 Files selected for processing (5)

• dbt/dbt_project.yml
• dbt/macros/generate_schema_name.sql
• dbt/models/silver/_ga4__sources.yml
• dbt/profiles.yml
• docker-compose.yml

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📝 Walkthrough

Walkthrough

Adds dbt project and profile configuration for BigQuery, custom schema generation, GA4 event source registration, and Docker-based local OAuth/ADC support.

Changes

dbt BigQuery setup

Layer / File(s)	Summary
Project and schema configuration dbt/dbt_project.yml, dbt/macros/generate_schema_name.sql	Defines dbt directories, cleanup targets, silver/gold materializations and schemas, plus custom schema-name resolution.
BigQuery connection and container wiring dbt/profiles.yml, docker-compose.yml	Adds development OAuth and production service-account targets, configures the profiles directory, and mounts local Google Cloud credentials read-only.
GA4 source registration dbt/models/silver/_ga4__sources.yml	Registers the environment-configured GA4 events_* source table pattern.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• BCSDLab/KOIN_DATA#7: Updates the dbt service configuration in Docker Compose.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/dbt-scaffold

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