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)

src/modules/garden/manifest.tsx

@@ -0,0 +1,12 @@
+import type { ModuleManifest } from "../_core/module";
+
+const gardenManifest: ModuleManifest = {
+  id: "garden",
+  name: "Garden",
+  nav: { href: "/garden", label: "Garden", icon: "sprout" },
+  entities: [],
+  dashboardWidgets: [],
+  quickAdds: [],
+};
+
+export default gardenManifest;