Verify water gathering interaction

Docs/Terrain/GroundZeroResourcePass.md

@@ -12,8 +12,9 @@ height, slope, and drainage-candidate analysis.
   patches that yield the MVP `food` item.
 - Stone: slope, exposed terrain, and valley-edge areas.
 
-Freshwater remains separate because the water-source roadmap item follows this
-pass and should be implemented as its own gameplay actor/system.
+Freshwater is separate from depleting resource nodes. Ground Zero uses
+`BP_FreshWaterSource`, an interactable water actor that restores thirst through
+the survival component.
 
 ## Implementation
 
@@ -24,6 +25,9 @@ pass and should be implemented as its own gameplay actor/system.
   Zero resource nodes.
 - Added `Scripts/verify_ground_zero_resources.py` to validate node presence,
   yield item IDs, and remaining harvests.
+- Freshwater placement and interaction are covered by
+  `Scripts/verify_ground_zero_water_source.py` and
+  `Scripts/verify_water_gathering_interaction.py`.
 
 ## Counts
 

Docs/Terrain/GroundZeroWaterSource.md

@@ -19,6 +19,12 @@ it restores thirst through `UAgrarianSurvivalComponent::AddWater`.
 
 - Restore amount: `45`
 - Interaction text: `Drink from Fresh Water Spring`
+- Player path: focus the source, use the shared interact input, and let
+  `AAgrarianGameCharacter::ServerInteract` validate range before calling the
+  water source interaction.
+- Automation: `Scripts/verify_ground_zero_water_source.py` validates placement
+  and restore amount, while `Scripts/verify_water_gathering_interaction.py`
+  verifies the native interaction path and documentation remain wired.
 
 ## Follow-Up