feat: publish approved RF4 media catalog

apps/api/app/routers/media.py

@@ -0,0 +1,24 @@
+from fastapi import APIRouter, HTTPException, Query
+from fastapi.responses import FileResponse
+
+from ..media_catalog import published_assets, published_file
+
+
+router = APIRouter()
+
+
+@router.get("/api/v1/media/catalog")
+def media_catalog(entity_type: str | None = Query(None, pattern="^(fish|waterbody|tackle|reference)$")) -> list[dict]:
+    return published_assets(entity_type)
+
+
+@router.get("/api/v1/media/assets/{digest}", response_class=FileResponse)
+def media_asset(digest: str) -> FileResponse:
+    item = published_file(digest)
+    if not item:
+        raise HTTPException(status_code=404, detail="Media asset not found")
+    path, media_type = item
+    return FileResponse(path, media_type=media_type, headers={
+        "Cache-Control": "public, max-age=31536000, immutable",
+        "ETag": f'"{digest}"',
+    })