feat: add garden module infrastructure (task 70)

- Add MinIO service to compose.yaml with named volume
- Add generic /api/uploads POST+GET route with auth, 5 MB, image/* guards
- Add src/lib/minio.ts singleton client with ensureBucket helper
- Add garden Drizzle schema: containers, plants, care_logs, care_schedules, species_cache
- Register garden module in src/modules/index.ts and src/lib/db.ts
- Apply migration 0015_garden_schema.sql
- Add MINIO_* and PERENUAL_API_KEY to .env.example
- Add task briefs 70-75 for the full garden feature arc
- Add uploads.spec.ts E2E test (RED → GREEN on route auth guard)

.env.example

@@ -33,3 +33,12 @@ LOG_LEVEL=info
 
 # GitHub (required for pnpm release — creates a GitHub Release)
 GITHUB_TOKEN=
+
+# MinIO object storage (used for plant/container image uploads)
+MINIO_ENDPOINT=http://localhost:9000
+MINIO_ROOT_USER=famapp
+MINIO_ROOT_PASSWORD=changeme
+MINIO_BUCKET=garden
+
+# Perenual plant species API (https://perenual.com — free tier available)
+PERENUAL_API_KEY=