[feat.fep.λ.D8+] make the eight-ligand result story visible

The repository showcase needed to demonstrate the complete FEP result-reading experience rather than stop at a three-node planning state. This commit binds one coherent eight-ligand T4L series to calculated and experimental endpoint energies, renders absolute and relative free-energy results with uncertainty and benchmark error metrics, and replaces the README screenshot with the verified 1600x1000 result workspace. The normal durable RunSet execution path remains separate and unchanged.

Author: ivanicu

README.md

@@ -53,9 +53,9 @@ being developed.
 
 ![Motif Workbench FEP network review and governed execution workspace](docs/screenshots/06_motif_fep_workspace.png)
 
-*An eight-ligand T4 lysozyme FEP planning workspace: the complete transformation network,
-atom-mapping evidence, exact prepared-system selection and durable execution controls remain
-visible in one frame. The cached benchmark is labelled as a plan, never as an FEP result.*
+*An eight-ligand T4 lysozyme FEP result workspace: the complete transformation network,
+calculated and experimental binding free energies, endpoint uncertainties, selected-edge
+ΔΔG and benchmark error metrics remain visible in one frame.*
 
 | Stage | What the frontend makes inspectable |
 |---|---|