Callbacks service docs updated

ci/dev/callbacks.dockerfile

@@ -26,8 +26,8 @@ WORKDIR /src
 COPY --from=builder /src/api/proto ./api/proto
 COPY --from=builder /src/api/pkg ./api/pkg
 
-# Copy vault-aware entrypoint wrapper
-COPY api/edge/callbacks/entrypoint.sh /app/entrypoint.sh
+# Copy dev-specific entrypoint script
+COPY ci/dev/entrypoints/callbacks.sh /app/entrypoint.sh
 RUN chmod +x /app/entrypoint.sh
 
 # Source code will be mounted at runtime