feat: Add Findagram and FindADispo consumer frontends

- Add findagram.co React frontend with product search, brands, categories
- Add findadispo.com React frontend with dispensary locator
- Wire findagram to backend /api/az/* endpoints
- Update category/brand links to route to /products with filters
- Add k8s manifests for both frontends
- Add multi-domain user support migrations

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

findagram/backend/app/routes/brands.py

@@ -0,0 +1,32 @@
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from typing import List
+
+from app.database import get_db
+from app.models.product import Brand
+from app.schemas.product import BrandResponse
+
+router = APIRouter()
+
+
+@router.get("", response_model=List[BrandResponse])
+async def get_brands(db: AsyncSession = Depends(get_db)):
+    result = await db.execute(
+        select(Brand).order_by(Brand.name.asc())
+    )
+    brands = result.scalars().all()
+    return [BrandResponse.model_validate(b) for b in brands]
+
+
+@router.get("/{slug}", response_model=BrandResponse)
+async def get_brand(slug: str, db: AsyncSession = Depends(get_db)):
+    result = await db.execute(
+        select(Brand).where(Brand.slug == slug)
+    )
+    brand = result.scalar_one_or_none()
+
+    if not brand:
+        raise HTTPException(status_code=404, detail="Brand not found")
+
+    return BrandResponse.model_validate(brand)