GridConnect v0.2.3 — Standalone PowerFlowProxy integration This release extracts the forward and DC power-flow proxy implementations into the standalone PowerFlowProxy package. Changes: - Use the external PowerFlowProxy package in NetworkManager and reconfiguration workflows. - Preserve the historical GridConnect proxy import paths through compatibility aliases. - Share the constraint result schema with PowerFlowProxy while retaining API compatibility. - Preserve forward-proxy and DCPF outputs and behavior. - Add integration coverage confirming that GridConnect resolves the external proxy classes. - Depend on PowerFlowProxy v0.0.2. Verification: - Complete GridConnect test suite passes: 80 tests. - Standalone PowerFlowProxy tests pass. - Package import and compatibility identity checks pass.