fix: apply A1/A2/A3 to the live services/ copy and ship it in the backend image

backend/routers/analyze.py imports services.* (root package), not
backend.services.* - so the earlier A1/A2/A3 edits landed in an unused
duplicate. Also COPY/mount services/ so the container can start at all
(ModuleNotFoundError: No module named services).

backend/Dockerfile

@@ -8,6 +8,7 @@ COPY backend/requirements.txt ./requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt
 
 COPY backend ./backend
+COPY services ./services
 
 EXPOSE 8000