Make stat fill-direction engine-owned (fix afflictions still filling wrong)

`invert` and `dangerHigh` are stat semantics, not owner tuning — but they were in
the SurvivalStatsConfig instance's override map, so a stale/place-saved instance
(carrying the old Invert=true) overrode the corrected engine default and kept
Poison/Hunger/Thirst filling the wrong way. Removed both from STUDIO_ATTR_MAP and
stopped shipping them on the config template, so the engine always owns them and a
stale instance can never freeze a bug across an update. Per-bar `Invert` attribute
remains for a deliberate one-off display flip.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

assets/config/SurvivalStatsConfig.model.json

@@ -9,8 +9,6 @@
         "Max": 100,
         "Start": 100,
         "WarnAt": 25,
-        "DangerHigh": false,
-        "Invert": false,
         "Display": true,
         "Icon": "",
         "ValueFormat": "fraction"
@@ -24,8 +22,6 @@
         "Max": 100,
         "Start": 100,
         "WarnAt": 25,
-        "DangerHigh": false,
-        "Invert": false,
         "Display": true,
         "Icon": "",
         "ValueFormat": "fraction"
@@ -39,8 +35,6 @@
         "Max": 100,
         "Start": 0,
         "WarnAt": 25,
-        "DangerHigh": true,
-        "Invert": false,
         "Display": true,
         "Icon": "",
         "ValueFormat": "fraction"
@@ -54,8 +48,6 @@
         "Max": 100,
         "Start": 0,
         "WarnAt": 25,
-        "DangerHigh": true,
-        "Invert": false,
         "Display": true,
         "Icon": "",
         "ValueFormat": "fraction"
@@ -69,8 +61,6 @@
         "Max": 100,
         "Start": 0,
         "WarnAt": 25,
-        "DangerHigh": true,
-        "Invert": false,
         "Display": true,
         "Icon": "",
         "ValueFormat": "fraction"
@@ -84,8 +74,6 @@
         "Max": 100,
         "Start": 0,
         "WarnAt": 25,
-        "DangerHigh": true,
-        "Invert": false,
         "Display": true,
         "Icon": "",
         "ValueFormat": "fraction"
@@ -99,8 +87,6 @@
         "Max": 100,
         "Start": 100,
         "WarnAt": 25,
-        "DangerHigh": false,
-        "Invert": false,
         "Display": true,
         "Icon": "",
         "ValueFormat": "fraction"

src/stats/StatConfig.luau

@@ -21,14 +21,17 @@ local StatConfig = {}
 StatConfig.CONFIG_SECTION = "SurvivalStats"
 StatConfig.CONFIG_INSTANCE_NAME = "SurvivalStatsConfig"
 
--- Attribute name on the Studio Configuration child -> resolved field name.
+-- Attribute name on the Studio Configuration child -> resolved field name. Only OWNER-tunable
+-- knobs live here. Stat *semantics* — `invert` (fill direction) and `dangerHigh` (which end is
+-- bad) — are engine-owned and deliberately NOT overridable from the instance, so a stale or
+-- place-saved instance can never freeze them to a wrong value across an engine update (the bug
+-- where Poison/Hunger filled the wrong way). For a one-off display flip, set the per-bar
+-- `Invert` attribute on the HUD bar itself instead.
 local STUDIO_ATTR_MAP = {
 	RatePerSecond = "ratePerSecond",
 	Max = "max",
 	Start = "start",
 	WarnAt = "warnAt",
-	Invert = "invert",
-	DangerHigh = "dangerHigh",
 	Display = "display",
 	Icon = "icon",
 	ValueFormat = "valueFormat",