Add typed field-flight prototype and preserve native qualification failures

docs/prison-held-action-design.md

@@ -1,6 +1,6 @@
 # Proposed genuine held-F prison-lock proof
 
-Design only; no held-F run or code change is established by this document. The next experiment is one real keyboard hold after independently accepted approach and alignment. It must not select an action, call an action method, change a door, move the player, alter input settings, or extend the original observation clock. A normal-input lock completion would establish this local route only, not multiplayer reliability or passage through the opened gate.
+The three read-only observer phase extensions are implemented, source-tested and compiled in the20:57 field fixture snapshot. The held-F helper, independent validator and actual interaction remain pending; no held-F run is established. The next experiment is one real keyboard hold after independently accepted approach and alignment. It must not select an action, call an action method, change a door, move the player, alter input settings, or extend the original observation clock. A normal-input lock completion would establish this local route only, not multiplayer reliability or passage through the opened gate.
 
 ## Native behavior that determines the proof